>UberRush takes 33%. //

Man, that is terrible. This is a major problem with capitalism, the optimisation doesn't work when it gets corrupted with marketing - in theory these frontends would compete until they were making practically nothing above their costs, in practice the one(s) with the most capital behind them (or best marketing department) will win and leech the money away from the producers and to the people who commissioned a clever app. It all seems pretty evil to me.