well, that's not necessarily fair. Apple has done an incredible amount of work to give devs and content creators an audience in the first place. Their rules are no different from many others. The economics of a "good business" need to take into account the delivery costs. Just because those costs are borne by a 3rd party (apple), does not mean those costs aren't real. Yes, shifting the costs more on apple would change the economics for app developers, but as long as the economics remain great for apple, they keep developing better services, devices, and platforms for devs to use (and, they give some of that away for very cheap or free).