Amex Offering 15% off on Radisson 8/1/17-10/31/17

I just received the flyer in the mail promising 15% off for Radisson hotels booking between 8/1/17 to 10/31/17. Just follow the instruction on the link and pay with Amex card

https://www.radisson.com/amexoffer

Full Terms and Conditions with emphasis added:

Exclusively for American Express^® Card Members

Get 15% off your stay at participating Radisson^® hotels in North and South America when you book and pay with any American Express^® Card for your stay between 8/1/17 and 10/31/17.

Make your reservation and use your American Express Card today!

 *Offer valid when you book and pay with any American Express Credit or Charge Card for your eligible stay between 8/1/17 and 10/31/17 (“Promotion Period”). Fulfillment of the offer is the sole responsibility of the participating American Express merchant. Offer valid when you book online at www.radisson.com/amexoffer or call 1-800-333-3333. Promotion Code “AMEX Save 15%” must be entered/mentioned at time of reservation. An eligible stay is defined as a booking for one (1) evening or more in a standard room (single or double occupancy) at the same participating hotel for which the guest specifically booked the promotion using “AMEX Save 15%.” There are no minimum or maximum number of nights required. Extra person charges may apply if double occupancy is exceeded. Blackout dates apply and may vary by property; please see individual property for details. Offer valid at participating Radisson hotels in North and South America (“Participating Hotels”). Participating hotels are subject to change without notice and the number of rooms available for this promotion at participating hotels may be limited. Offer is not valid at Radisson® Blu or Radisson® Red hotels. Offer excludes incidental charges such as taxes, service charges, or room service charges accrued during the eligible stay. Offer not valid for previous stays or existing reservations. Advance reservations required and subject to availability. Rates for each night may vary. Offer is not redeemable for cash. Promotion cannot be used in conjunction with any other promotions/offers/discounts. Offer does not apply to group, corporate, or convention rates. Cancellation policies vary by hotel; contact the individual hotel for more information. Void where prohibited by law. By participating in this promotion, you agree and consent to these terms and conditions. POID: CGWQ:0001.