It runs a closed-loop network, meaning it issues the cards, processes the payments, and serves the merchants all at once, so it earns a fee on nearly every dollar its customers spend.이 네트워크는 카드를 발급하고 ...
PREMIUM 그렉 에이벌 Berkshire Hathaway 68% 투자 집중, 미국익스프레스가 눈길
