Not sure specifically but I think they require the coins to be regulatory compliant if memory serves so we won’t be seeing many shitcoins getting listed on this platform which I think is good
I also asked that question on their telegram and they said that there's a two option on listing to their future exchange. Option one is via bitcoin or direct fee payment to get listed. Option two will be the voting of the coin.
That's good, It will going to be really nice if they will going to make a background check on the coins/projects that asking them to get listed on their exchange before they accept it.