I know right? I have never heard that such gambling site that has 0% house edge do exist, are they still earning?, just wondering. Anyways, if this gambling site that you are talking about do exist then I think that all of the gambling players all around the world would always gamble in this site because they would never lose, and they would grow their bitcoin bigger in this way. So, I presume that this gambling site's owner is a multi-billionaire because his gambling site has 0% house edge which means he is just giving his money to anyone that would gamble in his gambling site.