At
https://duel.com/fairness they state games are provably fair. People should be able to reproduce the outcome using the seeds and that the random number generator is unmodified. I haven't checked but I really doubt that if the games weren't really provably fair this would not have already been discovered and exposed to the community. If the games are fair you can safely assume the same as for the 0% edge.
I knew about the Provably Fairness and ways to verify it but if a game is truly provably fair, it does not mean you are playing a game with 0% house edge. As if it is fact like that, other casinos and other games would advertise themselves as 0% house edge already.
I saw many casinos with games and marks as Provably Fair especially big casinos with Provably Fairness Verifiers from third party sites and community as well.
I don't master the term 0% house edge but your explanation on it sounds not accurate.
Probably fair and zero house advantage are two entirely different things and it is well that you separated them. The provably fair only can be used to prove that the game outcome is not manipulated after the bet, that is, the outcome can be checked by using server/client seeds and hashes. It does not mean that the payout structure is player-friendly and eliminates the mathematical casino advantage. It is possible to have a game that is 100% provably fair and exhibits an integrated house edge with its odds table. When Duel is asserting 0% advantage, that would be due to their payout model or fee structure and not due to fairness itself. Both claims should not be thought of as the same thing, they should be considered separately.
