Verify with your own research of course, but there are no other good options now that Poloniex is out. Enough analysis out there to attest to HitBTC being beyond doubt a scam exchange and that their volume numbers faked.
Unfortunately I was turned off by just a little bit of background checking around Bittrex. It is run by homeland security and deep state contractors (One reference there are a few others if you dig and follow names). Nothing wrong with that of course who better to have a handle on security. However “coincidentally” Bittrex is also where a few high profile stolen cryptocurrency heists have been cashed out and the trail of the perpetrators has ended: [1], [2], [3], [4].
Ok maybe not a show stopper just bad luck and Bittrex going to court to defend the identity of the hackers is good for account privacy yes(?). Then things like this give you pause so you dig some more and start turning up lots of stories like this and this.
I also really hope all this helps the team reassess the decision to move over to ERC20 or not. There are number of benefits beyond access to a much wider array of exchange options as I pointed out over on this post.
After launching an ERC20 version of MaidSafeCoin, MaidSafe could become a liquidity provider on UniSwap earning a rate of return on their holdings and in the process attracting a wide range of other exchanges to list it, the most exciting of which are some quality trustless DEXs.