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What a signpost is How to read this page

A watched question with a line drawn in advance

The threshold was written before the observation existed. That is what stops a state from being argued into place after the fact.

Four states, no probabilities

Observed, emerging, contested, not observed. These are qualitative readings against the threshold. No number is invented here, because an invented number would be the most quotable and least true thing on the page.

It stays alive between revisions

The update condition names what would move the state. A signpost that has stayed quiet is information too, and is published rather than hidden.

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SCN-MKT-003 · Observed 2025-07-01

emerging

Zero-click Walled Discovery and Causal Measurement

Qualitative signpost review · no probability assigned

Bounded observation

Cloudflare introduced Pay Per Crawl so site owners can allow, charge or block AI crawlers, returning HTTP 402 for paid access and 403 when blocked. This is a concrete shift toward licensed or closed source access, but the provider announcement does not measure user zero-click behavior, publisher revenue recovery or adoption of causal measurement.

Trigger threshold

Move to observed when independent traffic data show declining qualified referral alongside rising answer-interface usage and material publisher blocking/licensing, while advertisers increase calibrated holdout or MMM use in operations.

Counter-indicator

Product availability on one infrastructure provider is not publisher adoption, crawler payment volume, click-through decline, source monetization or independently audited measurement behavior.

Update criterion

Review Cloudflare adoption disclosures, publisher access policies, referral panels and advertiser experiment/MMM usage quarterly; upgrade only when closure and measurement shifts are jointly observed and downgrade if open referrals and source economics recover.

Primary routes

  1. https://blog.cloudflare.com/introducing-pay-per-crawl/