Gambling site will always win in the long run due to the house edge.
Sites will need huge capital in case of some lucky wins by whales to pay out to them.
House Edge is the key of success of every gambling site sometime very few lucky gamblers won big money but in long term in the only House Edge win there, PD has much much big bankroll and player got paid intantly.
i agree with you much hard to defeat the house edge, Primedice is the biggest dice site ever with huge bankroll and i have no issue with payout with them.