There are more than 3 million registered users on the forum, I don't know the active members in recent days. However, we can safely assume that we at least have 30k members who were active in the last 30 days. It is very much possible that there are hundreds of members brow3sing the forum in a given period of time. Would you call them alt? I think no. The proof you have shared means nothing unless you have a lot of similarities and other proofs.

Also, please use this thread when you want to post about alt account- Known Alts of any-one - A User Generated List Mk IV (2022 Q3) [MODERATED]