If you're talking about Segwit2X,use hitbtc. Exchange it here:https://hitbtc.com/exchange/B2X-to-BTC
If you're talking about using segwit address to send or receive bitcoin,you can send your bitcoin to any exchange,wallet that accepts bitcoin inconsiderate of which address you use,segwit/legacy. Correct me if I am wrong.
How Segwit2x is still listed in HitBTC and still alive is perplexing, while other coins like Burst is continued to be ignored.
But if they are making money out of it, who can blame them?
Hitbtc are ruining their reputation just like bittrex,poloniex. They are listing every single coin/token. They have become more greedy and such behaviour is really not good for a reputable exchange. I believe one listing costs around 5-10
BTC ,like you said,who's to blame them?