EU caps interchange fees at 0.3%, which is probably still too much. The 3% is mostly to finance the various gimmick programs that make naive people think they a

EU caps interchange fees at 0.3%, which is probably still too much. The 3% is mostly to finance the various gimmick programs that make naive people think they are "gaming the system" with their 20th card in wallet (and because they can, of course).