>>40269460No, it's not the minimum either. It just used YT API and scrapped chatlogs to count unique memberIDs over the year. However, it's not a given that once membered, people will stay membered forever (i.e: if I joined Gura's membership on Feb 2022 and left on May, I will still be counted here).
All in all, this is fun to look at, but doesn't really say anything much. Using the chat scrapping method, at best you can only roughly estimate the minimum amount of members a chuuba has over a month period