I have faced the same issue, trading volume is not so significant since there are many exchanges on CMC with zero trading volume. Also, there are many exchanges on CMC with 2 or 3 trading pairs only. I can't understand why this happens and why they don't list new exchanges. I think it's the oligopoly. We are involved in crypto industry in order to avoid such practices from banks, etc and now we face thw same issue from CMC. Just not fair.