>You're filtering out people who don't really care about participation in whatever group or society is there.

You underestimate how many people would rather do nothing than be inconvenienced, sadly. If you're not the personality that the community is rotating around, you'll find the migration pretty lonely.

Heck, even esablished personalities can only do so much. Remember that Microsoft paid top Twitch streamers 10s of milllions to move to Mixer for exclusive streaming. Even that wasn't enough to give a leg up.