I've forwarded all the info and new insights about this matter to the guys that started investigation. Their comment on all of this - rebranding and the things they ask for as a proof of funds are just another signal that it's a fraud. As many have said before, do not send them your signature. They've announced that they indeed are successor to bitebtc, so, the investigation will continue.

btw, you should all report their new twitter account too.