I guess there are to reasons.
One of them is Trump
They don't let me withdraw my funds and are forcing me to send a copy of my id and a selfy which i deny before they don't answer my questions
1.Where their main office is located
2.Where my copy of ID will be stored
3.How it will be stored and protected
4.If they take full liability for loosing my copy to a third party
Since they deny to answer these questions i deny to send a copy of my ID.I choosed a basic membership with full intention to not be forced to send a copy of my ID to a company like Bittrex which denys to answer these simple questions.
Asking if i get Bitcoin Gold for the BTC which is stucked at Bittrex lead to an instant ban.
I know that a copy of ID and selfie are required in exchanges it is required by the central bank based on what I've read in my wallet. But there's something wrong with how bittrex reacted to your queries. First of all, you are a customer and I believe that we are entitled to ask them that kind of questions because and ID is important and should be private because it can be used illegally by anyone who get their hands on it.