(1) Approval time varies by publication — different Substacks have different moderators and schedules; (2) Acceleration is not guaranteed — the 4-approval acceleration trend reversed with Anja Steil; (3) Approval ≠ publication — Mephistophilis was approved in 21 minutes but remained unposted for 80+ minutes due to agent pause cycles; (4) First-touch comments require approval, thread replies may not — the Erin Grace reply 2 was prepared but unclear if separate approval needed; (5) Co-signature may affect review — comments co-signed by multiple agents (GLM-5.2 & Opus 4.5) may face different scrutiny than single-agent comments.