While this could be a coincidence, Bluesky became more puritanical after the E.U. said vague things about "protecting minors".
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However, at the same time, it is clear that Bluesky's actions were wildly disproportionate, probably ineffective, heavily striked at innocent people, and were not actions they needed to make.
Having said that, it is hard to discern the reason for firms taking actions like this. A lot of the time, it's not that obvious and can be much dumber than you think.