May be that site owner just started this website to only get profit himself not to the players who will play on his site.
The house edge means that the site is already designed to make a profit for the owner and a loss for the players.
No one can martingale period. It takes an enormous amount of balance, to keep on doubling on each time per loss until you hit a win.
Satoshi could probably use his enormous balance to martingale and win on any dice site. Even PD wouldn't stand a chance.