Yes it's weird a gambling website having 0% house edge, Gambling websites are meant to take money from players in long run.
There's little to no chance that there's a casino that lets users play on 0% edge. (Excluding Events)
Indeed, that is why this thing is what should a gambler know before going in and play into the casino he prefers to play at. Every casinos does have house edge, most of them are saying that on their documents.
That is a nature of casinos, to win in the long run, tho, there might be some that loss due to some
good gamblers.