I don't know how long you've been in the space, so forgive me if I seem condescending. Twitter and Facebook used to be extremely open and encouraging to developers. That's how they gained prominence, by allowing... nay, incentivizing developers to use their platform. Once they hit critical mass, that was all unceremoniously ripped away.

Assuming a for-profit venture like Bluesky gains critical mass, it will absolutely happen again.