https://www.bloomberg.com/news/articles/2021-01-05/amex-revamps-platinum-perks-again-in-bid-to-retain-customers
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"AmEx on Tuesday promised to announce in coming weeks new perks for customers of some of its biggest co-brand cards, such as those with Delta Air Lines Inc., Marriott International Inc. and Hilton Worldwide Holdings Inc." 라고 되어 있습니다