From 3000 daily active users on June 1, 2023 to 47500 on June 26, 2023.
According to Lemmy’s documentation, “An active user is someone who has posted or commented on our instance or community within the last given time frame.”
Sources:
- https://lemmy.fediverse.observer/dailystats&days=30
- https://join-lemmy.org/docs/contributors/07-ranking-algo.html
EDIT: check out this link for a list of lemmy apps: https://lemmy.world/post/465785
The fediverse is decentralized, anyone can start their own lemmy/kbin/mastodon/whatever server and make an account they just approve themselves.
If you mean some kind of global approval then that destroys the whole point of the fediverse.