Foldapp is a website that allows you to get 20% off Starbucks purchases by paying with Bitcoin. They are looking to expand to other retail companies that accept gift cards. Similar to companies like Gyft, Fold allows you to buy gift cards supported by the International Coffee Lounge, through the great efficiency and minimal costs of Bitcoin. Simply load up with Bitcoin on the Foldapp website, and it will generate the magic code to get you Starbucks coffee, blueberry cheesecake, or whatever else you fancy, at 20% off. Fold recently asked for feedback on ZapChain (the buzzing Bitcoin hangout), and …