I discovered lemmy back when reddit started to charge for their API. However upon taking a look at it, it seemed that apart from like 8 communities,there was not much going on elsewhere. Things seem to have changed since then, quite a lot of active communities these days. So how many users do yall reckon lemmy has now? Is it close to 5M? or perhaps even higher?
Mastodon is the biggest fediverse platform and that has just short of 900k MAU (monthly active users) with around 8M registered users.
In terms of non activity pub but federated protocols, matrix is probably the biggest with a user count in the hundreds of millions. They also market very well to goverments and the public sector tho so they get lots of users from massive deployments with millions of users on one server.