I think justdice, as it is a long-standing gambling website. The only problem is that they use an alt-coin called "clams". These are sometimes considered scam-coins as a few people own the majority of these.
Why do not they use other coins? One reason could be that they are supporter of Clam and Clam is a PoS coin. When user deposit Clams there, Justdice will earn interest with the coins.
AFAIK, justdice was closed due to the fear of regulations on the casino. Clams is an altcoin and is hard to convert to cash hence they used it. Even though they control a huge portion of the available coin, the system distributes the staked coin among the investors and
justdice do not directly get profit from it.Regarding the very last past, it is not really true. From the FAQs (
), 10% commission is charged on staking rewards before they are shared out.