Update: Many people are reporting offers for 10,000 MR after $500 spend. Share your data points in the comments!

Saw this come up on all of my Membership Rewards-earning cards in my Amex account:
Amex Travel 7500 MR

Note that it can only be used for hotel bookings (Esther and I have made this mistake before), and, it excludes Fine Hotels & Resorts as well, but it’s a pretty sweet deal if you have cash bookings coming up.

Here are the full terms:

Enrollment is limited. Valid online for a hotel booking at AmexTravel.com. Offer not valid at American Express Travel offices. Offer not valid on Fine Hotels & Resorts, Cars, Cruises and the flight portion when booking flight+ hotel together. Valid only on US website. Please note that hotels, car rental companies, cruise lines do not accept prepaid cards for charges authorized in advance, although prepaid cards may be used to settle the final bill. Check to make sure prepaid cards are accepted before attempting to use your American Express Serve® or Bluebird® Card to take advantage of this offer. Offer is non-transferable. Must add offer to Card and use same Card to redeem. Only U.S.-issued American Express® Cards that are enrolled in the Membership Rewards® program at the time of purchase are eligible. Your enrollment of an eligible American Express Card for this offer extends only to that Card. Your enrollment does not extend to any other Cards that may be linked to the same Membership Rewards program account (such as Additional Cards). Limit 1 enrolled Card per American Express online account and limit of 7,500 bonus Membership Rewards points per Card. These bonus points are in addition to any points you would normally receive for purchases on your Card under the terms of your Card Member Agreement and the Membership Rewards program. When we calculate the extra points benefit for Amex EveryDay® Card products, points awarded under this offer will not be included. Bonus points may be reversed if a qualifying purchase is returned or cancelled. Bonus points will be credited to your Program account within 90 days after the offer end date, provided that American Express receives information from the merchant about your qualifying purchase. If American Express does not receive information that identifies your transaction as qualifying for the offer, you will not receive the bonus points. For example, your transaction will not qualify if it is not made directly with the merchant. In addition, in most cases, you will not receive the bonus points if your transaction is made through a third party. Terms and conditions for the Membership Rewards program, as well as annual Program fees, may apply for certain Card products. Visit membershiprewards.com/terms or call 1-800-AXP-EARN (297-3276) for more information. Participating partners and available rewards are subject to change without notice. The value of Membership Rewards points varies according to how you choose to use them. To learn more, go to www.membershiprewards.com/pointsinfo. Bonus ID: A8UT POID: CAC5:0001