with CrowdDice.com there would never be such a problem, you'll never play against the house, but against other players
bad luck for 1DiCe1 and investors
Same at ED. You weren't playing against the site, you were playing against the investors. The site made a profit from every bet, just like you do on your site.
It's much the same. You could decide to run off with player funds at any time, since you hold them which the bets are pending.