Marriott has offered this promotion before and I think it is one our family will participate in again this year.
From the website:
“Get a free night after two stays* with MegaBonus®—and unlock more. Register from September 6 to November 30, 2017.
- Register by November 30, 2017
- Stay at any of our participating hotels and resorts worldwide between September 12 and January 15, 2018
- Earn a free night after two paid stays*.
Book direct to get our lowest rates worldwide. When you’re ready, redeem points for free nights, flights, exclusive experiences and so much more.
Earn a free night – and more bonus points for your stays through January 15, 2018.
*A ‘stay’ is defined as consecutive nights spent at the same hotel, regardless of check-in/check-out activity.”
Register here: Marriott Promo