First airlines, and then hotels, used loyalty programs to offer incentives to frequent travelers, but today brand loyalty programs are just as common in financial services and retail.

• 首先是航空公司，后来是旅馆，都使用顾客忠诚计画提供给经常旅行者诱因，而今日的品牌忠诚计画在金融服务跟零售业里非常普遍。