Sources say Amazon is making a move that threatens PayPal and banks that issue credit cards: passing discounts it gets on credit-card fees to retailers that use its online payment service. In doing so, Amazon is sacrificing short-term profitability to boost the fortunes of its payments system. JPMorgan Chase, Citigroup, Visa, Mastercard and payment processors First Data and Stripe Inc. partake in the $90 billion per year swipe fee industry, about 2 percent of a typical credit card purchase or 24 cents for debit. Continue reading Amazon’s Plan to Lure Retailers to Amazon Pay via Discounts