Amazon blocked AI agents for a year. Now it sells ads inside one
Amazon spent twelve months walling its catalog off from AI platforms — crawler blocks, a court order against Perplexity's shopping agent, product feeds cut from Google Shopping. On Thursday it announced the thing all that blocking was quietly building toward: its advertisers can now run ads inside ChatGPT.
The mechanics are narrower than the headline. The pilot is US-only, limited to select brands that already advertise with Amazon Ads, and runs through Amazon's demand-side platform as a managed service — Amazon's team sets up and optimizes the campaigns, while OpenAI's ads system keeps every delivery decision. Units appear as text or images beneath ChatGPT responses, priced on cost-per-click and cost-per-thousand-impressions, with a product-feed option that auto-generates creative from brand catalogs. Delta Vacations is among the first named advertisers. We covered the announcement this morning; what deserves the deeper look is the strategy underneath it, because it's not the reversal it appears to be. It's the completion of one.
For over a year Amazon has run a two-track playbook. Track one: containment. It restricted how ChatGPT, Claude and Gemini can access its webstore, updated its systems to block OpenAI's crawlers, stopped supplying product feeds to Google Shopping, and went to court to keep Perplexity's agent away from its data. Track two: presence. It began buying ads on ChatGPT in the spring and became the top retail advertiser on the platform between April and August, according to Sensor Tower data. Amazon never objected to conversational AI as a surface. It objected to other people's agents browsing its catalog for free. The difference between those two positions is now a product: the catalog stays fenced, and access goes through the paid door.
The numbers behind the handshake
Both sides bring something the other can't build quickly. OpenAI's ad business launched in February, reached a $1 billion annualized revenue run rate in late August, and serves tens of thousands of advertisers against roughly 900 million weekly users — with a reported internal target of $100 billion in ad revenue by 2030, a figure that requires more than 200% compound growth every year from here. Amazon operates the third-largest digital advertising platform, which neared $70 billion in revenue last year, and it arrives with the one asset every ad platform eventually needs: first-party shopping data that shows what people actually buy, not just what they search.
The partner choice is itself information. OpenAI reportedly discussed this role with The Trade Desk earlier this year and had already plugged in Criteo, StackAdapt and the major agency holding companies. It picked the company with the most advertisers and the most purchase data — and handed a strategic win to a competitor The Trade Desk has spent years positioning against. Amazon, for its part, has been on an 18-month supply chase, locking premium inventory out of Netflix, Roku, Spotify and Disney's platforms, often undercutting rivals on fees to do it. ChatGPT is simply the newest and possibly most consequential supply it has locked down.
Who wins, who loses, and the awkward question nobody's answering
OpenAI gets credibility and a distribution pipeline: tens of thousands of advertisers can now reach its users without OpenAI building a global sales floor first. Amazon gets reach beyond its own store — Delta Vacations is exactly the kind of non-endemic advertiser that would never buy a retail-media placement — and keeps its advertisers inside its own buying stack as attention fragments across new surfaces. The structural loser is Google, whose search-ad machine is built on being the intermediary between intent and purchase. The intent conversation is migrating to an assistant with 900 million weekly users, and now the incumbent middleman of the last era is supplying the new one.
The counter-story is Walmart, which chose the opposite door: it opened its catalog to ChatGPT instead of walling it off, and reportedly draws roughly 20% of its referral clicks from the platform — while Amazon's share sat under 3% even before its crawler blocks, per Modern Retail data. Amazon is now paying for visibility Walmart gets organically. Whether that's discipline or ego is the question the next two quarters will answer.
Then there's the awkward one. ChatGPT is simultaneously a recommendation engine and an ad surface. When the assistant suggests a product and a sponsored unit sits beneath the answer, the line between advice and advertisement is a policy decision, not a technical one — and OpenAI hasn't published how that separation works. Advertisers buying through Amazon's stack are effectively funding the ambient bias of the medium their customers trust. This is the same underlying problem the payments industry is circling with its own fix: Visa, Mastercard and Ant want one trust layer for AI agents, because transactions — and the recommendations that lead to them — need provenance when no human is watching the shelf.
The skeptics have a point
eMarketer's Nate Elliott told Digiday it would be "overly generous" to call this a Q4 stress test for OpenAI's ad business, noting the company is "still trying to build out even many of the basics" — team, technology, formats, pricing. He's right. Inventory is limited to ChatGPT's free and cheaper Go tiers, measurement is so immature that OpenAI only recently partnered with LiveRamp to fix it, and early marketer reports on performance have been underwhelming.
There's also a compliance shadow. Amazon is reportedly under an FTC lawsuit alleging its ad auction hid surcharges that overbilled brands — and that's the company now positioned as the bridge into the next great ad channel, at exactly the moment the EU put ChatGPT under the Digital Services Act's strictest tier, adding a regulatory surface to every unit sold there.
The deeper contrarian read cuts against the whole deal: if agentic commerce works as advertised, the sponsored impression is the wrong primitive. An agent that compares, selects and checks out on your behalf doesn't need a banner — it needs a trustworthy product graph. OpenAI is building both the ad business and the transaction rails at once, and they pull in opposite directions. Watch whether OpenAI's agent features start visibly favoring paying advertisers; that single disclosure would tell you which business the company actually is.
What to watch: whether the pilot opens to all Amazon advertisers before the holiday quarter; whether the first delivery data shows chat ads outperforming equivalent search spend; and the FTC case, which will shape how much trust the ad-buying world puts in Amazon's newest intermediary role.
Sources: CNBC · Marketing Dive · Digiday · OpenAI
