@OP i guess you need at learn to understand the difference of free spins and playing with your deposit. Gambling or rolling/betting needs basic knowledge for you to at least win bigger before complaining.
I would go even further and present a different theory of what could be actually going on with OP and FreeBitcoin.
I used to play on that casino several years ago and I there is a reason they call themselves "FreeBitcoin", it is because they have an integration of their own off-chain Bitcoin faucet for anyone to use. They give you one free 'spin' for their faucet each hour, so when an hour passed one could earn anything between a few satoshis to an actually good quantity from the faucet.
My theory here is that OP could be using the Faucet to try to profit off his spare time, and until now he has not had much luck when he uses his free "spin" each hour, only getting a very small amount of satoshis, which he cannot even withdraw because of the minimum withdraval restrictions of the casino. If that is what is actually going on, then I have got two obvious things to say to OP:
. You are very unlikely to profit off faucets, for the time you invest on them it would be better just to get a remote job.
. Posting about your bad luck on any ANN won't get you anywhere.
Good luck and tell us know whether I am wrong or not, OP.