Please use https://btcpop.co/home.php (no country restrictions) or https://tradesatoshi.com/Exchange/?market=CLAM_BTC (not available in the US and Japan) to buy or sell CLAMS. 
Yobit is shit. 
Why TradeSatoshi isn't listed on CMC? I don't know. Btcpop.co is supposedly working on their API to be on CMC. But PLEASE, stop relying on CMC so much to find exchanges.