siwakotisaurav, first of all you have to realize that PRC is an investor site, so if PRC is doing that it's not just faking stats but directly stealing huge amounts from the investors (much more serious.) But yes, in the end "provably fair" does not exist for investors and therefor the site owner could do this technically. Personally I would trust the owner not to do this since he has been around for 2+ years, is holding 3,620 investor coins (see
cold wallet) and seems to be very trustworthy to me. Rationally, I would also imagine a site owner would steal in a much more discreet way. But in theory it's possible for sure.
That being said, the big gambler himself have claimed to be
mechs/fuckit. He is a legendary gambler that bet with the same style on Just-Dice for even bigger amounts:
see here. He started with 1767 BTC at 92% for 134 BTC wins. And his last bet was a massive 7016 BTC bet at 96% that he lost. His reaction after he lost? "ah well". (
full log) Actually by that time during the bets I am sure there were some people accusing him to be dooglus

(till he lost I guess :X) Anyway, I don't think there is real proof that this guy is mechs, but he claimed it himself and his betstyle + way of chatting, does seem like it.