For a long time, I did not trust the evaluation and display of CMC. The number of fake volumes is huge. The figures here are not realistic. If in the top 10, I think of Binance, okex, houbi, ... but I don't see it here lol.
Look again, binance at 10th place according CMC
https://coinmarketcap.com/rankings/exchanges/There are lot of unpopular exchanges though, but it's unexpected for those can be the top 10 exchange sites (even beat binance)