Yeah, I was thinking of scraping the active users as well but from what I observed when trying different instances, the active users aren’t counted separately by instance so the active users would just be all the active users on that community no matter where they are from. That info is already available on lemmyverse.net so I didn’t want to copy it.
I bet there is a way to do this with the Lemmy API but I don’t have a good understanding on how to use it so I am just waiting for someone more knowledgeable than me to try this again but with more care.
Edit: Unrelated but I went through the subreddit stats for a bunch of subs and it seems like posts and comments for a lot of them have dropped off after the API changes so that seems bad for Reddit and good for us.