Airline executives have hinted in recent years that frequent flyer programmes, particularly in the US, are profitable. It took a global pandemic to reveal just how profitable.
近年来，有航空公司高管暗示，飞行常客奖励计划是赚钱的，尤其是在美国。但直到一场manbetx app苹果 疫情才揭露出这类计划有多赚钱。
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