Tim Cook's pay package indicates he will remain very active at Apple; sources: Apple's plans to squeeze more App Store profits prompted Phil Schiller to leave (Mark Gurman/Bloomberg)

Tim Cook’s new compensation package ties a large portion of his earnings to performance targets, signaling that he will remain heavily involved in Apple’s operations. Sources say Apple’s strategy to extract additional revenue from the App Store led senior vice president Phil Schiller to depart. The company’s upcoming September 9 event is expected to reveal further details on these initiatives.