The Amazon Kindle Windows RT App was one of very first issued for the latest iteration of Windows 8. One of the drawbacks was that if you wanted to purchase any content, you were directed to your computer’s default web-browser. Today, the Kindle app was updated to allow you to shop for ebooks, newspapers, and magazines directly in the app.
One of the reasons why the Kindle app did not allow for purchases right away was because of the custom billing system, where Microsoft takes 30% from every transaction. One of the great elements of RT apps is that businesses can develop their own billing solutions within the app, and they do not have to rely on Microsoft to broker the transaction. It looks like all of the semantics have been ironed out and customers can easily buy content from their Surface RT tablet or directly on their Windows 8 PC.