~snip~
On the other hand, having 0% house edge is impossible to grow in the long run especially if they have a lot of players. It would be better if they have at least 1% house edge to sustain their maintenance fees on the site. Zero house edge would lead to bankruptcy.
Sounds you are right, thats why commonly all kind of gambling sites that has a 1% house edge. I don't think how to survive the gambling casino without a house edge, all fees are covered on that and at least the gambling site owner will keep the profit from house edge. If the scam site wanted to tempt gamblers and one of their victim they will lower the edge but actually they are not safe.