I've also noticed a few of those profiles (those with the numbers in the end) that created spam megathreads in which Yatsan was often posting. I wouldn't be surprised if he purposely created new topics through the alt accounts in an attempt to create more content.
Some of Yatsan posts have been deleted after reporting them; he has been active since yesterday; it's unknown if he has been kicked from Stake. His ignoring this thread is proof enough for admission of guilt. Perhaps he has other accounts as well, since this account had changed hands since 2018 or 2019, but for some reason it wasn't a big deal back then.