Bluesky social network drops invite-only sign ups - The Verge:

Even with ActivityPub taking off, Bluesky is ready to have its moment in the spotlight again. Starting this week, the app is removing its invite system and throwing open its doors to anyone who wants to sign up. And later this month, it plans to begin letting outside developers host their own servers on its underlying AT Protocol that’s designed to rival ActivityPub.

Since Threads, this has always felt more like Jack vs Zuck, than ActivityPub vs AT Protocol.