Through January 15 Hyatt is offering triple American miles per Hyatt stay, for a total of 1,500 AAdvantage miles per stay. The bonus can be earned a maximum of ten times. Registration is required either via this page or by calling Hyatt Gold Passport with promotion code AA001.
This offer can be combined with Hyatt’s current fourth quarter promotion which runs through November 15, offering 5,000 Gold Passport points after every three nights.
If you choose to earn miles for your stay you’re giving up Gold Passport base points and elite bonus points, though as a Diamond member you would still earn the Diamond welcome amenity points.
This definitely doesn’t make sense for a longer stay, but for a one night stay at a cheap hotel this isn’t a half bad option.