There is no gambling site that has 0% house edge. Because in the long term, it's because of the house edge that a gambling site and casino makes money. And if there's no house edge, then surely in no way the casino can survive for long because a few lucky player can make the casino go bankrupt!
Yeah, they can survive with 0% edge, the only thing needed is another revenue system, either advertising or fees of some sort.
Like the edgeless casino above, they made their money through their coin even though they have a 0% edge.
It's like those "free to play" mobile games, that are free to download and play and have no ads, but you would have to buy items from their store. Though, it's not needed to buy, it's an incentive to spend and have an income.