There's also clamchecker.com. They have fee of 24%; for every 4.6 CLAM you claim you get 3.5 CLAM, they get 1.0 CLAM and the affiliate gets 0.1 CLAM. On Just-Dice for every 4.6 CLAM you claim you get 4.6 CLAM. The site takes off 0.001 CLAM for the transaction fee and you get the rest.
17% (ish) if you refer yourself for BTC.
That is hedging your bets against the CLAM market and still earning Bitcoins from a empty address.
(3.5 CLAMS + .002 BTC)