Morgan Stanley analyst Katy Huberty released an extensive new report today offering a look at how Apple's base of 500 million iTunes/App Store customers fits in with other services and how Apple can leverage that user base to drive future sales and revenue growth. Huberty notes that Apple's account base is second only to Facebook's one billion accounts among technology companies seeking to build out e-commerce or subscription services, easily topping third-place Amazon's 200 million accounts. Apple's 55% growth in 2012 also led the field by a comfortable margin, while its users also generate the most revenue per account. With Apple also scoring well in iCloud/iTunes Match adoption and user loyalty, the company is primed to take further advantage of its massive ecosystem with new services. Huberty outlines three possibilit
