Put it this way; there's a lot of advantages to joining a shitty Mastodon with tons of rules instance over Bluesky despite instance blocking:
You have a higher chance of being seen by someone outside of the garden, people passing the links around, etc.
You are slightly less on your toes about being banned given Bluesky's vague invite policy that isn't even clarified that well. I've heard conflicting reports about it. Sure you can't migrate once you're banned, but that's what having alts you advertise is for.
Zero fucking algorithms. BlueSky is fun because you can follow a poster who might be a gimmick account and a day later it's having every post flagged for spam with interactions down the toilet.
You can post a dumb gimmick tweet and if you're a starfucked eceleb you can get 70+ reposts and 200+ likes.
Gifs, videos, higher upload limits, higher character counts, post scopes including DM (yes it's insecure as all fuck, but it's an illusion), and more cool features BlueSky has yet to add.