Programmatic Advertising That Shows Where Every Dollar Went
Programmatic can reach almost anyone on almost any screen. It can also quietly route your budget through
resellers and made-for-advertising sites. John Williams buys programmatic and CTV with the supply chain
written down, the deals chosen on purpose, and lift measured against a holdout.
36¢ of each DSP dollar reached consumers effectively (ANA, 2023)
21% of impressions in the ANA study ran on made-for-advertising sites
15+ years buying media across Google, Microsoft, Meta, and Amazon
TL;DR
We pick the DSP from your goal and data: DV360 for Google-centric stacks and YouTube, The Trade Desk for
open-internet and CTV reach, Amazon DSP when Amazon shopping signals matter.
Supply is an inclusion list, not an exclusion list, and only sellers authorized in ads.txt, app-ads.txt, and
sellers.json get bids.
Deal types are chosen by job: programmatic guaranteed for must-have CTV, preferred deals and private
auctions for curated quality, open auction only behind strict filters.
Brand suitability and invalid-traffic controls run through accredited verification, and they're checked
against log-level data, not trusted blindly.
Results are judged on incremental lift and backend outcomes. Flat fee, never a percentage of media.
Who this is for
Brands adding CTV and online video to search and social, who need reach without waste.
Advertisers with a managed-service DSP contract who can't see fees, sites, or supply paths in
their reports.
Retail and CPG brands selling on Amazon that want to reach Amazon audiences off Amazon.
Marketing leaders asked to prove upper-funnel spend works. CPMs and view-through conversions
won't satisfy a CFO. A holdout test will.
What's included
Supply audit: where your last 90 days actually ran, by domain, app, and CTV channel, with
made-for-advertising and reseller-heavy paths flagged.
DSP and seat recommendation, including whether you should hold your own seat so the data and
the contracts are yours.
Deal plan: which publishers get programmatic guaranteed or preferred deals, which run as
private auctions, and what open auction is allowed to buy.
Brand suitability and fraud setup with a third-party verification vendor, plus a written
tolerance for news, user-generated content, and MFA inventory.
Measurement plan: conversion tags, a holdout or geo test, and a monthly report on cost per
quality impression alongside backend results.
How John runs programmatic
Start from the waste numbers
The ANA's study of $123 million in open-web programmatic spend found that only 36 cents of every dollar
entering a DSP effectively reached consumers, and that the average campaign ran on 44,000 websites (ANA). In the UK, ISBA and PwC found publishers received 51% of advertiser spend, with 15% that couldn't be
attributed at all (ISBA). Every plan we write starts by asking where those losses are in your account.
Pick the DSP for the job
Display & Video 360 fits advertisers already on Google Marketing Platform and buying YouTube. The Trade
Desk's OpenPath connects buyers directly to publisher ad servers, and its Kokai platform now applies Sincera
quality signals such as ads-to-content ratio and ad refresh in inventory controls (The Trade Desk). Amazon DSP has become part of Amazon Ads Agent, where programmatic buying runs as DVA+ campaigns with
advanced settings, with access to the same Prime Video, Twitch, and Fire TV inventory (Amazon Ads).
Buy only from authorized sellers
DV360 checks every seller in the SupplyChain object against the publisher's ads.txt or app-ads.txt file and
excludes unauthorized sellers. Its default still allows resellers, and a stricter "Authorized Direct
Sellers" option buys only direct paths (Authorized Digital Sellers). We decide reseller tolerance per campaign. CTV usually gets direct only.
Set suitability with the new controls
As of October 1, 2026, DV360 deprecated digital content labels and most sensitive-category exclusions for
programmatic inventory and consolidated them into three inventory modes (Maximum, Moderate, Limited) and 10
content themes (DV360 Q3 2026 updates). Accounts built on the old settings need remapping. We do that first, then layer on third-party
verification.
Measure lift, then expand supply
New supply gets added in tested blocks: a holdout or geo split, a fixed read date, and a cost-per-quality-
impression comparison. Supply that can't show lift goes back to the bench.
Common programmatic mistakes John fixes
Exclusion lists instead of inclusion lists. There are always more bad sites than you can
block.
Optimizing to CTR or cheap CPMs, which pushes spend toward made-for-advertising sites. The
ANA found MFA sites took 21% of impressions and 15% of spend in its study.
Buying the same impression through many paths. The Trade Desk, citing Sincera data, says a
single impression can be reachable through as many as 600 supply paths (SPO guide). Each hop takes a fee.
CTV bought on trust. In IAB's 2026 survey, 67% of buyers had somewhat to no confidence in the
quality of CTV bought through open exchanges, and 55% said the same of private marketplaces (IAB).
View-through conversions reported as sales. They show reach overlap, not causation.
Planning around the end of third-party cookies. Google kept third-party cookie choice in
Chrome and in October 2025 retired most Privacy Sandbox APIs, including Topics and Protected Audience (Privacy Sandbox). Identity strategy should rest on first-party data, not on a deprecation that isn't coming.
Deal types and the supply-chain standards we check
Deal type
How it works
When we use it
Programmatic guaranteed
Fixed price, reserved inventory, one buyer, delivery guaranteed.
Must-have CTV and sponsorships where you'd otherwise sign an insertion order.
Preferred deal
Fixed price, not guaranteed. The buyer gets a first look and can pass.
Quality publishers where you want priority without a commitment.
Private auction
Invitation-only auction with a floor price.
Curated packages and publisher groups.
Open auction
Any eligible buyer, real-time bidding.
Scale buys behind an inclusion list, direct-path filters, and verification.
In DV360, non-guaranteed fixed deals take priority over private auctions, which take priority over the open
auction (About non-guaranteed auctions). That ordering decides who wins shared inventory, so deal setup is a strategy choice, not paperwork.
Before any supply goes live, we check it against the IAB Tech Lab standards built for this problem:
ads.txt and app-ads.txt: the publisher's public list of authorized sellers. Version 1.1 added
OWNERDOMAIN and MANAGERDOMAIN, and app-ads.txt extends the standard to mobile and
CTV apps (IAB Tech Lab).
sellers.json and the SupplyChain object: who each seller or intermediary is, and every party
that touched a bid request (sellers.json).
Accreditation: verification vendors and measurement held to Media Rating Council standards,
and supply partners certified under TAG's Certified Against Fraud program.
One more change to plan for: DV360 and Campaign Manager 360 will count billed display impressions at "begin to
render" from February 2027 to align with MRC standards, so expect a slight drop in billed impressions.
Pricing and engagement
Programmatic management is a flat monthly fee, quoted after a supply audit. It depends on the number of DSPs,
deals, and markets. Per the pricing page, nothing at Ahmeego is billed as a percentage
of spend and there are no long contracts. A one-time supply audit can be scoped on its own.
Platforms we work in
The DSPs, verification, and identity tools we buy through. Official product pages below.
It depends on your stack and goal. Display & Video 360 suits advertisers on Google Marketing Platform who
also buy YouTube. The Trade Desk suits open-internet and CTV reach with direct publisher paths. Amazon DSP,
now inside Amazon Ads Agent, suits brands that want Amazon shopping signals and Prime Video or Fire TV
inventory.
What is supply-path optimization?
Buying the same impression through the fewest, most transparent intermediaries. It means preferring direct and
authorized sellers, cutting reseller hops, and comparing cost per quality impression across paths instead of
headline CPM.
What do ads.txt and sellers.json actually do?
ads.txt (and app-ads.txt for apps and CTV) is the publisher's public list of who may sell its inventory.
sellers.json identifies each seller and intermediary, and the SupplyChain object lists every party in a bid
request. Together they let a buyer refuse counterfeit or unauthorized supply.
Are made-for-advertising sites always bad?
Not always, but they're rarely what an advertiser means by quality. In the ANA's 2023 study they
took 21% of impressions and 15% of spend. We set a written tolerance with you and enforce it with inclusion
lists and quality signals.
Do third-party cookies still matter for programmatic?
Yes, for now. Google decided in April 2025 to keep third-party cookie choice in Chrome, and in October 2025
retired most Privacy Sandbox APIs. Safari already blocks third-party cookies by default, so first-party data
and identity solutions like UID2 matter regardless.
How do you measure CTV?
With a holdout or a geo test, plus backend sales or site visits from the exposed regions. Platform-reported
view-through conversions show overlap, not cause, so they never stand in for incremental results.
How are you paid?
A flat monthly fee, never a percentage of media, as set out on our pricing page. We recommend the DSP seat and
contracts sit in your name, so fees, sites, and supply paths stay visible in your own reports.
Talk to John about programmatic
Tell John which DSPs you use, your monthly media, and whether you can see site-level and log-level data. He'll
reply with where he'd look for waste first.
John, Kristy, or Sandeep will reply.One of the three of us will respond personally within 1 business day. No SDR queue.
Message received.
One of us will reply directly within one business day. While you wait, run a free
Buddy audit on your account.
Top 25 references
The primary sources, standards, research, and tools we rely on for this work. Every link was checked on
2026-10-11. We aren't affiliated with these publishers unless noted.
Official documentation
Authorized Digital Sellers in Display & Video 360— Display & Video 360 Help How DV360 checks every SupplyChain seller against ads.txt and app-ads.txt, and the difference between
direct-only and reseller settings.
Programmatic Guaranteed deals— Display & Video 360 Help How reserved, fixed-price deals work in DV360, including deals with third-party exchanges and
renegotiation.
About non-guaranteed auctions— Display & Video 360 Help Explains private auctions, packages, and the priority order between fixed deals, private auctions, and the
open auction.
Brand suitability— Display & Video 360 Help DV360's suitability controls and how IAS and DoubleVerify pre-bid verification plug into insertion
orders and line items.
Display & Video 360 updates in Q3 2026— Display & Video 360 Help Documents the October 2026 consolidation into inventory modes and content themes and the February 2027 move
to begin-to-render impressions.
Why OpenPath is a win for advertisers— The Trade Desk How OpenPath connects buyers directly to publisher ad servers and how to compare OpenPath delivery against
other paths in reporting.
Amazon DSP is now part of Amazon Ads Agent— Amazon Ads Explains the move of Amazon DSP into Amazon Ads Agent as DVA+ with advanced settings, and confirms
campaigns, deals, and pricing carried over.
Update on plans for Privacy Sandbox technologies— Google Privacy Sandbox Google's October 2025 retirement of Topics, Protected Audience, Attribution Reporting, and other APIs
after keeping third-party cookie choice in Chrome.
Standards & policy
ads.txt and app-ads.txt (Authorized Digital Sellers)— IAB Tech Lab The specification and version history, including the 1.1 OWNERDOMAIN and MANAGERDOMAIN fields and the
app-ads.txt extension for mobile and CTV apps.
OpenRTB SupplyChain object specification— IAB Tech Lab (GitHub) The technical spec for the schain nodes that list every party paid for an impression, which DSPs check
against ads.txt.
OpenRTB— IAB Tech Lab The real-time bidding protocol behind open auctions, private auctions, and deal IDs, including CTV ad pod
support.
Open Measurement SDK— IAB Tech Lab The shared SDK that lets verification vendors measure viewability in apps and on CTV without each one
shipping its own code.
Content Taxonomy— IAB Tech Lab The standard content categories that contextual targeting and brand suitability settings map to across
platforms.
ads.cert— IAB Tech Lab An open cryptographic protocol suite, Call Signs and Authenticated Connections, that lets ad platforms
verify which business is sending bid requests and other server-to-server traffic.
TAG certification programs— Trustworthy Accountability Group (TAG) Certified Against Fraud and related TAG programs, the seals to require from SSPs, exchanges, and publishers
in your supply.
Minimum Standards for Media Rating Research— Media Rating Council The MRC standards and guidelines, including invalid traffic and viewability, that accredited measurement
and verification vendors follow.
2026 Digital Video Ad Spend & Strategy Report— IAB Buyer confidence in CTV inventory quality by buying method, with the weakest confidence in open exchanges
and private marketplaces.
Leading tools
Unified ID 2.0 overview— UID2 (Unified ID 2.0) Documentation for the open-source, email-based identifier many DSPs and publishers use where third-party
cookies aren't available.
AI disclosure: This page was drafted with AI assistance and edited by a human. Platform rules and
study figures are cited to official documentation and the original reports as checked on 2026-10-11; confirm
against the linked source before acting. Brand names mentioned in John's background are past engagements listed on
the about page; no current endorsement is implied.
Check your tags and consent setup for free.
The Marketing Analytics Auditor checks the pixels and consent signals your DSPs depend on.
Display & Video 360
The Trade Desk
Amazon DSP (Amazon Ads Agent)
Google Ads
YouTube
Unified ID 2.0
Google Analytics 4
Google BigQuery