And? That’s good. Facebook grew originally by being exclusive. You had to be in college, and in a particular college. Lots of things grow by invite only.
People love exclusivity, even if there is no reason for it. Apple maintains exclusivity through cost, for basically the same hardware. As long as instances have more than like 500 users, they will be fine.
Lemmy already has growing pains. Why would you want to make them bigger? Let the owners grow their instances at their own pace.