Bittrex never said they would support Bitcoin Gold. They said they would issue Bitcoin Gold IF several valid conditions were met by the Bitcoin Gold developers, proving that Bitcoin Gold was legit and here to stay. The BTG developers were and still are very secretive and that doesn't go over well with exchanges. As of yet those things have not happened. Here's part of the Bittrex statement on it:
"Bittrex will make all reasonable attempts to credit our users BTG but until we have a fully supported wallet, we can neither guarantee tokens or consider creating a market. We will continue to monitor the state of the codebase and network. We'd also like to encourage the BTG development team to reach out to us."
Here's their full statement:
https://support.bittrex.com/hc/en-us/articles/115002320451-Statement-on-Bitcoin-Gold-BTG-Bittrex is not a scam. They closed a fraction of a percentage of their millions of accounts about 4 weeks ago for users that had not completed the account validation that SEC rules were now requiring Bittrex to comply with. Over the subsequent weeks those accounts were reinstated as those users validated their info.
Bittrex has not take a position on the Segwit2x fork yet. My guess is they will issue B2X tokens, but that is ME saying that, not them.