the average lemmy user has 3 alts factoid is just statistical error. the average lemmy user has 0 alts. alts georg, who lives on linux.community apparently and has 20,000 alts, is a statistical outlier adn should not be counted
Yeah, "monthly active users" does not necessarily mean "unique monthly active users".
I would much rather see activity statistics like posts+comments or something like that. As long as those are looking good, then new unique users will continue to join gradually.