From a CNN report:
On Monday [July 25, 2011], Amazon updated its Kindle apps for Apple devices to remove the "shop" button that sent consumers to Amazon's site to buy digital books.
Hulu changed its iPad app last month to remove a link to its website.
..the Google Books app disappeared from the App Store last week. Sony's Reader app has been unavailable since February, when Apple booted it because of an external link.
For Stanford CSP BUS74-75 students: You can see how Apple successfully shifted its business model axis from Source-Tool to Distribution-Control. Owning iTunes, first as a free PC application, then as a cloud service that includes AppStore and other marketplace entities, is an essential part of this strategy. Note that Microsoft (xbox) and Facebook have implemented similar in-game purchasing policies earlier.
tags :business, model, control, distribution, system, evolution, apple, google, information, market, transition, games