No commission has been cut, no cookie window shortened — yet the payout model that e-commerce affiliates depend on faces a structural threat larger than any single program-terms change. Google's Agent Payment Protocol and ChatGPT's Instant Checkout are moving toward release, and together they aim to pull hundreds of millions of users into zero-click shopping environments. In that scenario, the affiliate's role in the purchase path shrinks or disappears.

That is the hardest number in this story, and it is a scale number rather than a rate: hundreds of millions of shoppers, routed by two platforms that do not need a publisher's link to complete a transaction. For affiliates operating on rev-share or CPA deals in e-commerce verticals, the risk is not a lower EPC. It is attribution itself. If an agent selects the merchant, places the order and processes payment without a tracked click, last-click attribution has nothing to attribute, and no commission event fires.

The framing comes from a new survival guide published by mThink's Blue Book, which describes the two releases as "sounding alarm bells for small merchants and blaring air sirens for e-commerce affiliates." The distinction matters. Small merchants face margin and dependency pressure. Affiliates face disintermediation.

What the announcements actually say

Treat both releases as data to interrogate, not as finished systems. Google's Agent Payment Protocol is a payment infrastructure for AI agents — a specification that would let an agent act on a user's behalf at checkout. ChatGPT Instant Checkout is OpenAI's commerce layer inside a chat interface, designed to shorten the path from query to purchase to a single step. Neither announcement, as reported, includes published affiliate-attribution terms. That gap is the story. Networks and merchants have not specified how — or whether — referral commissions survive when the referring "publisher" is a platform-owned agent.

For comparison, consider how much of today's e-commerce affiliate economics depends on measurable inputs: cookie windows that typically run 7 to 30 days, attribution rules defined per program, CPA or rev-share rates negotiated against tracked conversion paths. Zero-click checkout collapses that stack. When the agent is the interface, the merchant pays the platform for order flow rather than paying an affiliate for a referred click. Whether merchants pass any of that cost through as affiliate commissions is unknown. Vendor assertions about coexistence should be read accordingly: they are claims, not measured results.

Where the exposure concentrates

Not every model faces the same pressure. Content affiliates in review, comparison and coupon verticals — the bulk of e-commerce CPA and rev-share volume — sit most directly in the path of agentic shopping, because their value depends on inserting a tracked touchpoint before checkout. Hybrid deals that blend CPL and rev-share components offer partial insulation only if the lead-generation side of the agreement still involves a human click. Loyalty, cashback and sub-affiliate models face the same core question: what happens to the commission event when no click occurs?

Small merchants carry a parallel risk the guide flags directly. If order flow consolidates into two agent ecosystems, merchants lose pricing power and pay-to-play access, and the programs they fund — including affiliate commissions — become cost centers under pressure.

Compliance and disclosure context

Agentic commerce also strains existing disclosure frameworks. FTC endorsement rules assume a human intermediary who can disclose a material connection to a merchant. An AI agent that selects products within a paid placement or commercial agreement sits outside that architecture. Affiliates and networks building agent-adjacent traffic should expect regulators and platforms to revisit disclosure standards, and should treat any placement inside an agent's recommendations as a sponsored context requiring the same scrutiny — and marking — as paid media today.

The strategic read

The Blue Book guide positions itself as a survival manual, and its premise is blunt: industry giants are racing, and affiliate revenues are in the path. The analytical takeaway for performance marketers is to stress-test portfolio mix now. Verticals where human research behavior persists — considered purchases, regulated categories, high-ticket goods — retain tracked-click friction longer than commodity replenishment, which agents will absorb first. Programs should also press networks for written attribution terms covering agent-mediated transactions before committing spend.

None of this is a measured-results story yet; it is a terms story, and the terms are unwritten. Google's Agent Payment Protocol and ChatGPT Instant Checkout will reach scale in stages, and merchants, networks and platforms will negotiate who gets paid in a zero-click world as they do. The affiliates who survive will be the ones watching those negotiations — and pricing the risk into their traffic plans — before the checkout moves out of reach.