I know for a fact that there was this guy who was caught by me had like 20+ high ranked accounts (I failed to get evidences for a few of his alts), all enrolled in highly paid signature campaigns, content creation competitions.
LOL. I find that hard to believe. Is there a thread where you expose them? If there really were 20 accounts or more connected it should be a farm more than a single guy, otherwise I think it's impossible. That person, if it was just one, would have to write 80+ quality posts a day to get paid in the campaigns.
I don't know, I think that even 3 or 4 alts, or 5 if you don't have another job can be managed by one person, but more is impossible.
In this case:
Long-time sig campaign farm ID'd via single wallet transaction I think it was an exceptional case, there were 3 accounts in the same sig campaigns but only in 2 of them I managed to write 50 posts per week and in the third one I didn't manage to do it. Let's say that in the third one wrote an average of 25 posts, that would be like managing 5 accounts in sig campaigns that pay for a maximum of 25 posts. And in this case we understand that writing in the forum was a full time job, so it seems unlikely to manage more than 6 or 7 accounts by just one person.