In every cryptocurrency transaction, the general rule when it comes to deposits and withdrawal is to to double check that specific address before executing it or else you'll never get it back or much worse it will be lost permanently.
one casino placed a bet on another casinos site, and it lost....
If it would have won, I would hope (or at least expect) them to return the winnings to the other site, but since it lost, It seems like satoshibones just received coins accidently into their wallet.
This doesn't make sense! If you accidentally pasted an address that comes from satoshibones then it means you have an an existing account on that site thus you are also able to transfer your litecoins back to the correct litecoin address that you intended to transfer in the first place isn't it?