Bittrex is operated by Russian dudes. What do you expect from that motherfuckers? Of course they gonna scam you. I saw a lot of posts here regarding bittrex scam. Stay away from that scammy exchange.
Their legal address and other stuff say other things, (US, WA ) if you mean they'r Russian mafia or something, then how in the hell feds in US let them to commit such a major crime against thousands of innocent people from all around the globe (and keep scamming more)? It is so f*king disappointing man.