Credence only needs to be on a couple of exchanges. Why is it necessary to go on the big ones? Whatever exchange they go on, people will go to those exchanges to trade them. I think 1 or 2 is probably best because if you are on too many exchanges, the prices can fluctuate too much and volume might be too low on those exchanges. If you like to buy and sell quick, the fewer the exchanges the better. It would be nice to go on Kucoin or COSS exchange but that is a different story.