You are right on with your description of the system. It will be the only system actively rating "swappers". Right now, many people do get burned on swaps. There should an amount of concern with swappers - given they way it has worked in the past.

Initially, I am personally contacting depositors to "keep people real" about what they have. That certainly will not 100% guarantee that someone won't slip through, but it will weed out most. From there, satisfaction will be rated by the hunter / fisherman going on the trip.

I like your arbitration angle too. I want to put more thought into it, but off the cuff I like it.