I have been monitoring my unread section and these accounts have posted the same comment and deleted after some time.
On the Services board, you can't delete your own post within 24 hours, to stop bump bots. But on a self-moderated thread, the OP can delete all other posts without delay.
Thread "management" isn't worth that much money, so it's clearly a bumping/spamming service. At that price, there is no reason so many people would respond to that Service "offer" in 2 days. That means it's his own shill accounts posting in his own thread, and by doing so, he is breaking forum rules.
The only problem is I can't prove this.
Check the other post. He's blatantly using his own alts to bump his own threads (and farm them in the process most likely) so I think it's likely he'll use them as part of his other service too.
As far as I know, that's against the rules and a reason for a ban, right?