i personally wrote a hit piece on BlueSky and then joined Nostr myself.

the reason people go to BlueSky and not Nostr is because they know Bluesky will be same shit as Twitter but with a shiny new wrapper plus it's by invitation, which makes you feel special.  so BlueSky is really offering people to feel better about themselves without any real change.

meanwhile with Nostr they know it's something different and they are afraid of change.  people don't want to BE they want to SIGNAL.

Bluesky is about signaling.  Nostr is about substance.

This is why Nostr will always be small - because most people have none ( substance ).