Amazon launched a new service this week that helps streamline transactions between online merchants and customers. “Login and Pay with Amazon” allows online businesses to implement a login/pay system using existing Amazon accounts so that customers can easily go from browsing to buying using their Amazon account information. Not to be outdone, PayPal announced an upgrade to its mobile app called Payment Code that interacts with existing barcode scanners and PIN pads. Continue reading Login and Pay with Amazon: Potential Competition for PayPal?