Before, I tried Hitbtc and Latoken, so it's just not suitable to use for me; it's just an opinion. Because most of the ones listed on Latoken are actually shitcoins and fake volumes of the coins listed here.
Then in Hitbtc, the fee is very expensive. In my experience, it's really different when you use the exchanges that are in the top 20 listed in the market than the exchanges you mentioned, which are worthless in my opinion.
These two are popular before and maybe they aren't that bad like now, because you know, many new exchanges have came out and surpassed their legacy. And it is normal for a failing exchange to just accept any tokens because they are still being paid with it. Hitbtc do only have a different approach.
Maybe they didn't accept much shitcoin but they only try to earn more via the expensive fees that they set. We don't know the other exchanges listed by the OP, so I wouldn't judge them yet. And when I check the CMC top exchange list, I'm surprised that there is a Coinw there. So maybe that exchange truly has a potential? And the other one might still be starting. Well, let's just see their performance later on if there is an improvement.