Wasn't the Twitter "bridge" just bot accounts though? It's a bit different with Bluesky because they've said that they completely support bridges between AT and AP but just don't have the resources to work on them themselves. Anyway, ActivityPub co-author Evan Prodromou gave an interview yesterday where he included Bluesky as part of the Fediverse because of the bridge.

Personally, I consider them to be both part of and not part of the Fediverse, I guess. I wouldn't send someone there and I also kind of think they're a bunch of dicks for re-inventing the wheel instead of contributing improvements here.