I think yobit has a bug that's why negative trusted users getting payment from them.
This shitshow is getting better by the hour. No wonder marco and other scammers are topping the list. Rare chance to cash in and obviously they already don't give a shit about the forum.
Up to 180 now:
Can you also check the inactive time between the wearing of this signature and the last post before the signature? Some accounts magically become active for this signature

(I have the suspicion that many of them are alt and this will speed up a lot the process to hunt them)
Yes, nowadays altcoin section is almost no good project and also bitcoin payment is low at the same time all people cant be accepted. The more important thing no one accepts negative trusted people. So, when they got a chance by luck they are trying to proper use of that. I think yobit should fix its bug to avoid negative trusted participant.