Following up on its earlier move to pull Audible audiobook purchases from its Play Store app, Amazon is also turning off Kindle digital book purchases on Android. Ars Technica reports: The Google Play purchasing crackdown is to blame, of course. Starting on June 1, Google will require all Play Store apps to use Google Play billing for digital purchases or face removal from the marketplace. Google Play billing technically has been in the rules for a while, but Google is ending a hands-off enforcement policy that effectively allowed companies to run their own billing systems. When you visit the Amazon app, you can still buy physical books, but digital purchases now show a “Why can’t I buy on the app?” link instead of a purchase button. Amazon’s link shows a popup that says, “To remain in compliance with the Google Play Store policies, you will no longer be able to

   

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