I could see a “choose for me” button, kind of like installing an OS where you can go with the automatic stuff or set it up yourself. I think you’d need several instances to get with join-lemmy.org to volunteer to be one of the ones that would sign people up for.

Folks who want to sign up for a specific instance in order to create or maybe moderate a community there almost certainly won’t go to join-lemmy.org for that, they’ll just go to that instance.

There may need to be a "Hey could we cool it with the fukpolitik’ agreement to be on that random sign-up list; I’m not sure I’d drop random folks into ex-Hexbear or whatever.