Clams sure fell hard since May 26th

, but I am happy to see the price now picking up over the past couple of days

That peak was likely the result of a single buyer or a small group manipulating the market, probably for the purpose of ripping off Poloniex through their dumb margin system (and given Poloniex's response to it, ultimately ripping off Poloniex's other users).
It you disregard that outlier pump CLAM is actually doing pretty well, considering market conditions. It's price in satoshis is actually higher than where it was late last year, which is not the case of a lot of well-known coins like ETH or XRP.