United States, April 1 -- Amazon (AMZN) announced a new Prime Business Card and a new Amazon Business Card, coming this spring, offering U.S. customers more ways than ever to save along with a suite of new features designed for small business customers. The cards will be issued by U.S. Bank (USB) as part of the Mastercard (MA) network.Customers can choose between two options: the Prime Business Card, offering Prime members 5% back on Amazon purchases, or the Amazon Business Card, offering 3% back for customers without a Prime membership*. Both versions of the card offer more rewards when shopping off-Amazon, flexible credit terms, and no annual fees. More details about the exciting new benefits will be announced in the coming months. For Am...