@Trev I think if Gargron is frustrated by the fact that famous people don't stick around, he's lost track of the nature of the thing he's created. Twitter attracts celebs because of its nature, it's designed to be a fame engine.
Mastodon is more analogous to the forums of old- a bunch of communities with a venn diagram of userbases. It works because it isn't a place where people desperately try to build a fanbase, but because we come here to talk to each other about what we're interested in.