The story. A sell-side column in AdExchanger argues that agentic skeptics are right about autonomous buying and wrong about the part that matters to publishers: agents already decide which inventory is worth bidding on. (AdExchanger, 9 November 2026)
The numbers in this piece
01What happened
- The skeptics have data. IAB Tech Lab’s Anthony Katsur expects “several false starts.” Digiday found in January that 54% of 142 brand and agency professionals do not use agentic AI in their workflows.
- The column’s argument is about cost. Mobile, cookie deprecation and other predicted shifts needed new integrations that someone had to pay for. Agentic AI can run through programmatic plumbing the buy side has already built.
- The buy side is splitting execution from decision. In an IAB survey of 360 video buyers, 28% use AI for deal execution and negotiation, and 40% require human approval before an agent acts.
- Evaluation is further along. Among buyers spending $50 million or more a year, 63% use or plan to use agents for inventory discovery and evaluation, against 30% of smaller buyers.
- The identity layer is consolidating. Microsoft moved its media planning and buying to Publicis on 8 April 2026. Publicis agreed in May to acquire LiveRamp, and the FTC cleared the deal in October with a five-year neutrality order.
The column’s comparison is bid shading. It spread across SSPs and DSPs within months of Google’s 2019 first-price move because the integrations already existed.
02What it means inside a GAM network
Most publishers watch price: floors, clearing prices, CPMs. A price question assumes a bid exists. The column’s point is that an agent can rule inventory out before an auction runs, so no floor you set is ever tested.
This will not show up in your floor reports. A bid that never arrives looks the same as low demand. If a segment of your inventory quietly loses bidders, the first sign is an unexplained drop in bid density or match rate in your GAM and Prebid reports, not a drop in price.
The column’s three steps are plain: stable identifiers across your properties, first-party attributes in bid requests that carry clear context, and explicit data authorization with terms in writing. The last one is about contracts. Bid-request signals can be visible to bidders who do not win, so who may use them is a legal question, not only an engineering one.
One caution: this is an opinion column, and the survey figures are about video buyers. The direction is credible, the size for display and mobile publishers is not shown, so treat it as a prompt to measure.
Autonomous buying may be years away, and the skeptics are right about that half.
03What publishers should do about it
04The bottom line
Autonomous buying may be years away, and the skeptics are right about that half. The half already moving is the decision about which inventory gets a bid. Publishers who can see their own bid density have a chance to notice first.
If you want a second read on your bid request data and Prebid setup, see our publisher services. For the earlier look at agents and auction volume: AI Buyers Skip 86% of the Auctions.