I am very happy to see that CMC shows 11 exchanges listing Ada, some of them are very small, at this link for Cardano… https://coinmarketcap.com/currencies/cardano/#markets
I don’t see these all listed on the Cardano home page at https://www.cardano.org/en/buy-sell-ada/
The Cardano dot org site says HitBTC is coming soon, but HitBTC is actually listed already. Cardano dot org does not list Gate.io either, which is starting to show a good little bit of trading action as well.
Edit: There are 22 listed below but several repeats.