Giving users who left Myspace the power to continue talking to the users who stayed was what broke the floodgates, leading to the "unraveling" that boyd observed.
Bluesky management has evinced an admirable and (I believe) sincere devotion to their users' wellbeing, and they've amply demonstrated that commitment with capital expenditures on content moderators and tools to allow users to control their own content moderation. They've invested heavily in fire suppression.
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