Moderator: Hyatt, American Express; FlyerTalk Evangelist
Join Date: Jun 2015
Location: WAS
Programs: :rolleyes:, DL DM, AA EXP, UA Silver, Hyatt Glob, Mlife Noir (=> Marriott Amb), invol FT beta tester
Posts: 21,595
I imaigne the short answer is: because that's the deal that DL and AMEX negotiated. Beyond that, it is what it is, something to be aware of when taking into consideration what works for you.