The US-based mobile media market has always been a giant step behind its European - and especially Asian - counterparts. But what is stunting growth in the stateside market? Americans have the disposable income to purchase mobile media assets, just like they have the money to purchase expensive iPhones, subscribe to high-end wireless plans, and barrel though endless text messages. That introduces the question of whether carriers are killing an early-stage media market by imposing heavy percentage demands. (Digital Music News)