Apparently Lemmy counts active users as users that have posted or commented, which means there’s quite a difference between total and active users. For Kbin, the difference is negligible. Does that mean that Kbin uses another formula for calculating active users?

Numbers according to FediDB right now;

Lemmy: 295,910 users, 57,546 active Kbin: 59,425 users, 58,999 active