If Nashx was a mediator: 1. It would require them to hire experts in all markets they wish to support. 2. And since mediation has a human factor, there will a

If Nashx was a mediator: 1. It would require them to hire experts in all markets they wish to support. 2. And since mediation has a human factor, there will always be scammers with some success rate of fooling experts around. Considering the mediator has no power to fight back at anonymous/remote scammers, the cost of attack is very-very low. By requiring both parties to risk their funds up-front, the cost of attack on a mediator becomes irrelevant. Scammers would have to either convince their victims that the good is delivered and get payment; or try to hack nashx website to hijack people's funds when they are being transferred back and forth. Another funny part: no payment method except Bitcoin allows provable destruction without everyone gathering in the same room.