Based on all the traffic and development activity I'm not sure on what basis one would say "failed"
One way they failed hard is that they talked about how they were against the investors and VC incentives, then they took $100M from Bain Capital (PE) just after peak user count, but didn't tell us for almost a year. They could have put up a simple $5/month to support the cause, but they took investor money instead. This is why I left.
What I see here doesn't look good.
https://bluefacts.app/bluesky-user-growth
Never mind the pivot to reddit.
https://www.cnbc.com/2026/06/04/bluesky-twitter-rival-reddit...
Source: Bluesky COO https://conference.publicspaces.net/en/session/growth-and-su... (somewhere towards the end in the Q&A section).