Tell me the economics of running a 500-person human review team reviewing 100k apps per week, provide yearly software framework/os updates, hundreds of people on App Store customer support, human curate the app store serving 500 million customers per week, running data centers around the world to deliver many app updates to 1.5 billion customers including in China all the while providing up to 2 petabytes of free storage to each developer and free Apple Mapping services (where Google charges hundreds of thousands of dollars for high volume users) on a $99/year/developer budget.