One thing I like about JD/clam is that there's virtual zero chance, or incentive for a big-exit scam. That's in comparison to most bitcoin investment sites, were there's strong financial incentives to do it.

Dooglus will probably hate me for saying this, but I see just-dice investing/clams as an epic version of bustabit. You can buy-in (polo), or claim the faucet (dig) and now the goal is to hold on (invest) while making phenomenal returns. You can cashout anytime, or risk the giant bust