Please sign a message proving you are in fact solvent. You claim to have 1k BTC volume every hour, which is no joke, so signing a message from an address containing 500 BTC should be no problem for you. It would also help prove your claims, as in the past day, according to thebitcoinstrip, only 7000 BTC was wagered in Primedice, Bustabit, Rollin.io, Crypto-Games and Pocket Dice combined.
Never trust a Chinese site, they are notorious scam, I heard this site before, pure scam. If they have so much fund, they will firstly improve the UI. But you trust them lies with sick UI?
