Starting today, Amazon will open up its Android Appstore to in-app purchases, according to a report in AllThingsD. Its model will follow that of Apple and iOS, with Amazon taking a 30 percent cut of each purchase. Transactions will be handled through Amazon's 1-Click purchasing system, which the retailer uses across its website and Kindle devices.Amazon's Appstore takes a 30 percent cut originally appeared on TUAW - The Unofficial Apple Weblog on Tue, 10