read many bad reviews on 999dice.com about their provably fair system. Did anyone won big on their site?
Do you have any links to these reviews you can share?
Because I heard some rumors myself and I am interested in serious summary where their Provably Fair system is debunked as flawed.
As for the payment question: I saw comments that players won up to 4-5 BTC and there was not problem with withdrawing it.
in order to see how they actually scam and get away with it. It's a long read but it really worths the time. I'm sure that after you do read it you will stay away from this site.