Maybe what's happening is the yobit chaps have found a way of encouraging users to wear old yobit signatures that have yobit.io link which was not banned whilst displaying Yobit.net on the signature for people to see
Don't think so, if that was the case by now the news would had been all round the forum just like how fast the signature announcement news spread within hours. Although since I can't find any news of cancellation of the campaign by Yobit or testimony from users getting paid for still wearing signature, i might just conclude this guys are just wearing the signature either to pissed off members against the campaign or simply waiting for an opening in other campaign.