They are making a killing from all these transactions. if you look at their account https://etherscan.io/address/0xf5bec430576ff1b82e44ddb5a1c93f6f9d0884f3 you will see they have a very nice stash of ETH.

I have been sending support requests, tried PM, facebook, twitter, reddit etc. Nothing helps with these people. I think they know we can not do much. You can not block their wallets or reverse the transactions and they are pretty much untouchable in Russia. The only thing that could be done is to get their server ceased as it is in the USA, but again unless you are a USA citizen I don't think there is much one can do.

It's a sad state of affairs, the technology is great but I think it will not succeed due to exchanges like yobit as people will loose faith in their security. I have been buying a lot of coins and tokens from many exchanges.....trust me it's a non stop uphill battle....all the exchanges I have dealt with have given me problems and they take absolutely no responsibility for your looses or missed opportunities.  When I sent my ETH to yobit 1ETH was worth about $940, it then shot up to over $1027, so had I had my ETH I could of made a nice profit, now it's down to $867 so I have made a nice loss....well maybe I will have a total loss...still to be determined. 

Unfortunately this is where banks still hold the advantage. :-(