Many users are now receiving a great AMEX Offer: spend $300 at Marriott and get $120 back, which works out to 40% off. Others are seeing different versions of the offer too, such as $300 back on $100 or $500 back on $100. This offer can be triggered by multiple purchases adding up to the spend requirement, and simply booking a hotel through Marriott’s official website will activate it.

Of course, many readers have also activated it by buying gift cards at the front desk of a local Marriott or Ritz-Carlton hotel. If you plan to go that route, remember to call the front desk first and ask whether gift cards are available so you don’t make a wasted trip.

In short, if you have this offer, add it now. You can use the free offer-add browser extension provided by this site to add the offer to all eligible cards at once and bypass the one-off-per-person limit.