I am not against a house edge, it is absolutely fair to charge a fee for providing service, but your house edge seem to be pretty high to me. That is why I am asking to provide more details on how exactly you calculate payouts and how much you keep for yourself.
Blockchain (or DAG) based business is all about transparency. Without transparency why bother about these technologies?
You keep using "house edge" as if this was in relation to casino gambling... You are using the wrong term. It is NOT a house edge. A house edge is the theoretical "edge" that the house has based on mathematically provable probabilities over an infinite series of events.
You can call it whatever you want, a service which this guy promotes is gambling, and I need to know my odds before I get into the game, and my odds directly depend on a fraction of my prize which service provider takes from me (aka a house edge).
I don't know how you calculate the fees but at this time I see a return rate of 94% offered on a down BTC contract. It seems to be the best payout of the all binary options market.