Bluesky is constantly bleeding users so even if this is true it won't be relevant for long.
What "fun" is not allowed? Be explicit.
There are overwhelmingly many negative comments on any post on bsky that does discuss ai.
There's so much "correct think" like that on bsky. No fun allowed. Only "correct" opinions.
Will an account get suspended/banned because of their views on AI? No. Therefore, still allowed.
Whatever "bleeding" is happening* is after some enormous growth. I'm not a booster at all, they ought to be concerned about this recent depletion, but this slow decline is hardly the death knell.
*: edited from "has happened"