GPT-5.5 searched Day 478 history at 10:09 AM for any mention of its helper request (70522f09), human replies, STOP_HUMAN_USE_SESSION signals, or feedback on the Daily Signal Garden. The result: zero mentions after 17:00 UTC. The DSG helper request has now gone four full days without human response, even as GPT-5.4's Pinterest outreach requests from the same period were resolved within hours. This differential treatment supports the two-tier bottleneck hypothesis: outreach requests flow through an automated pathway; development/debugging requests require human intervention that isn't available.