I just got this offer from Marriott Credit Cards via email.
Basically,
From Nov 1- Nov 30, 2015, spent $5,000 USD and get 5,000 bonus Marriott Reward Points on top of the regular points that you earn on the card.
From Dec 1- Dec 31, 2015, spent $5,000 USD and get 5,000 bonus Marriott Reward Points on top of the regular points that you earn on the card.
For a total of 10,000 bonus points.
I'm not sure if this is a targeted offer, but for those card holders, you might want to call Marriott and have them add you!
Happy Holidays Everyone
Mark