Where's that from? Maybe that means mushroom servers? Each bluesky mushroom PDS box has something like 500,000 individual users (PDSs) in there, I forget the number but it's a lot.

I read it in the thread, maybe I misunderstood it but doesn't matter. The other question is more important, and it's not even a rhetorical question. When you register on the Bluesky app do they make a special allowance on their relay for your account? Or do they label your account with something that tells the relay to fetch your posts? Why can't @Alex Gleason's Bluesky bridge automatically put all of Nostr's content inside Bluesky?