Why my favorite card to use at Marriott properties isn’t a cobranded card

Marriott is the world’s largest hotel chain, with over 9,000 properties worldwide, and when I am traveling, most of the time I find myself unlocking one of its hotel room doors. Marriott offers six cobranded credit cards between two issuers, American Express and Chase. Although I have Marriott Titanium elite status, you might be surprised to …