If I understand what Theymos did correctly, he banned members who'd had a post reported as spam against them marked good within the last month (?), but all Yobit sigs are disabled regardless of whether members got a ban or not.
Yes, the specific prohibition of signatures is that signatures containing "yobit.net" are banned for 60 days. Today i found a funny thing:
User
xLays still wears the yobit signature:

When checking the code in his signature, he has a link to a picture that says
Fuck You Idiot.

I don't expect the user changed it by himself as he previously admitted that he can't understand why his signature didn't get prohibitted.
Thymos disabled YoBit signature design but look I still wear Yobit signature design.

Funny Theymos
Archived for funny references.