Thanks very much for sharing! There are some pretty significant limitations, though (US properties - and only a subset at that - e.g.):
OFFER TERMS
Enrollment limited. Must first add offer to Card and then use same Card to redeem. Only U.S.-issued American Express® Cards are eligible. Limit 1 enrolled Card per Card Member across all American Express offer channels. Your enrollment of an eligible American Express Card for this offer extends only to that Card. Offer valid only at participating Marriott® brands in the U.S and U.S. territories, including: JW Marriott®, Autograph Collection®, Renaissance® Hotels, Marriott Hotels®, Delta Hotels®, Gaylord Hotels®, AC Hotels by Marriott®, Courtyard®, Residence Inn®, SpringHill Suites®, Fairfield Inn by Marriott®, TownePlace Suites® and Moxy® Hotels. Reservations must be made online at
Marriott.com, via the Marriott Mobile App or by calling Marriott Worldwide Reservations (888-236-2427). Excludes the following brands: The Ritz-Carlton®, St. Regis®, EDITION®, The Luxury Collection, W® Hotels, Bulgari®, Sheraton®, Marriott Vacation Club®, Le Méridien®, Westin®, Design Hotels™, Tribute Portfolio®, Four Points® by Sheraton, Protea Hotels®, Aloft®, Marriott Executive Apartments®, Element® and Vistana™. Excludes all timeshares, residences, travel packages, and retail store purchases. Offer not valid at international locations outside the U.S and U.S. territories. Excludes gift card purchases. Offer only valid on room rate and room charges. Offer not valid for lodging stays that are paid for before the promotion start date or after the promotion end date. Offer is non-transferable. Limit of 1 statement credit(s) per Card Member. Statement credit will appear on your billing statement within 90 days after 10/25/2018, provided that American Express receives information from the merchant about your qualifying purchase. Statement credit may be reversed if qualifying purchase is cancelled. If American Express does not receive information that identifies your transaction as qualifying for the offer, you will not receive the statement credit. For example, your transaction will not qualify if it is not made directly with the merchant. In addition, in most cases, you may not receive the statement credit if your transaction is made with an electronic wallet or through a third party or if the merchant uses a mobile or wireless card reader to process it. By adding an offer to a Card, you agree that American Express may send you communications about the offer. POID: GBMZ:0001