Casinos with a 0% edge do not exist and cannot exist since its the only way that guarantees that the casino will be making a profit in the long run. Having no edge over your customers means you're putting everything on the line and you'd need to be seriously luckly to even hold such a buisiness for a month without going broke.
It exist, though I think 0% house edge is just a false advertisement to attract players on their gambling site, because if it is true that they do really have zero percent house edge, then they will get bankrupt, and beside, there is no sane people who would do such zero percent house edge gambling site, it is a joke lol.