Is it possible that this is only controlled by one individual? Since the connections somehow overlap with one or more instances saying that this user is only using an ETH address that he randomly picks that time. One thing to note as well some users listed in the "active accounts" can't be considered as active anymore since a lot of them are inactive in a sense that their last activity in the forum is either in 2018 and 2019, to be exact among the first eleven accounts you included in the "active accounts" list only mycrypto93, dedeajah, and 21onyong can be considered active accounts in the forum.