Whatever the OP's intention was with this, I don't think we should believe everything he says. Even with this "evidence" he provided (which is easily faked, by the way). It seems to me that he just wants free promotion for his questionable service offerings.
This sounds far fetched. OP hasn't been involved in any of the forum dramas or trolling or spamming their service so I'd give them the benefit of the doubt that this offer indeed happened.
Sounds like maybe some sort of an onlyfans promotion maybe? Who knows what people are into behind the scenes. It seems that vulgar language in a signature is probably not the best way to promote something, but what do I know… I’d question why someone would pay for that, but money talks…
Sounds like you can't read.