If the site is 0% house edge then how they sustain in this gambling world. How can they make a profit and how can they run their website. These are basic questions will come in mind if any casino site says they had 0% house edge. After seeing this questions also you think it is 0% house edge then no one will help you in this matter. You cannot find any 0% house edge casino site.
Not if the games are pvp like poker or blackjack. This games does not necessarily need house edge for the casino to profit. But other games that rely purely on luck like dice, plinko and other games, the casino need house edge in order to survive.