Yes they are a good candidate I think. Curious about their sign ups though. Lemmy.world asks people to write “I agree to the TOS” in the answer box. If you do, a bot automatically approves you, if you don’t, a bot automatically declines you. There’s no waiting time.
Lemm.ee states In the “Answer” box below, please state that you agree to follow the lemm.ee instance rules (found in the sidebar of our front page), which has no specific phrase you need to answer, so I’m guessing they manually approve them?
I honestly think registration applications are a huge barrier to anyone not already on the fediverse.