Amazon Local Register, the company’s new card reader, is a black rectangular device that plugs into a merchant’s smartphone or tablet. For $10, it works with an app that tracks business transactions for merchants. Amazon offers lower processing fees with the device if a merchant signs up before the end of October, while the standard deal will remain a 2.5 percent charge, which is less than other card reader offers. The lower charge means that Amazon is likely making little profit. Continue reading Mobile Payments: Amazon Debuts New Credit Card Reader