What exactly would be a proof enough that they are paying for those posts? Would maybe table like the one below suffice, to see the clear connection between the accounts and various threads. I mean, for what other reason would same group of (mostly newbie) accounts write on the same group of threads, if not for being paid to do exactly that?
A lot of the time these sort of projects are advertising in their Discords, Telegram or whatever other communication they have. They often offer posting for an incentive. Though, I suspect these particular projects are doing it under the cuff.
I did find some advertising an incentive for posting though, which were removed. I suspect by some of the threads I came across that were already removed for the same reason.
Otherwise, its pretty obvious most of the time when users are posting in the same threads, and they're using the same phrases. Most of the users that are in these threads should now be banned or were already banned. However, its difficult to prove that the people behind the thread are paying for bumping services, despite it probably being quite clear they're. So, I won't be removing any threads that I can't prove are doing it, since that would open up a can of worms for projects trying to frame competitors.