It's about fairness and the convenience in withdrawals. I just found that dice games cannot be manipulated by the house I guess. So I was attracted to this games in some gambling sites.
They can't because there's provably fair.I gamble with my signature earnings and so far I have doubled most of my weekly payments 
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I used to this but I can't double my earnings. I gamble with few satoshis to have fun and sometimes I can't due to some circumstances that I have to sacrifice my entertainment to solve real life issues. Very people that I've seen who managed to double their weekly payments. .