Starwood Preferred Guest

Between September 12, 2017, and January 15, 2018, earn 1,000 bonus Starpoints per stay at St. Regis, The Luxury Collection, W, Le Méridien, Westin, Sheraton, Tribute Portfolio and Design Hotels properties, 500 bonus Starpoints per stay at Aloft, ElementS and Four Points properties, and 10,000 bonus Starpoints when you stay 25 or more nights. Register here by November 30, 2017.

Between January 16 and April 15, 2018, beginning on your second stay earn double Starpoints plus 500 bonus Starpoints on stays including a weekend night. Register for the promotion here

Hilton HHonors

Between January 1 and April 30, 2018, earn 2,000 bonus points on every stay plus an additional 10,000 Points on every 5 stays at any hotel or resort within the Hilton Portfolio excluding Hampton by Hilton Hotels in Mainland China. Register for the promotion here.

Marriott Rewards

Between January 16 and April 15, 2018, earn 2,000 bonus points per stay starting with your second stay, plus an extra 1,000 bonus points when your stay includes a weekend night, up to 50,000 total bonus points. Register here by March 15, 2018.

Between September 15, 2017, and January 15, 2018, earn a free night that can be redeemed at category 1-5 properties after completing two paid stays, and unlock additional offers depending on your Marriott Rewards elite status. Register for the promotion here by November 30.

World of Hyatt

The last global Hyatt promotion expired December 31, 2017, and the next one hasn't been announced yet.

IHG Rewards Club

Between January 1 and April 30, 2018, register for the current IHG Accelerate promotion and complete your targeted offers to receive bonus points.

Here's the list of current IHG PointsBreaks properties, for reservations made through January 31, 2018.

Club Carlson

Club Carlson is currently running four supposedly-targeted promotions, but I was able to register for all four and received e-mail confirmation of all four registrations:

  • Between November 1, 2017, and January 31, 2018, earn 15,000 bonus Gold Points after your first eligible stay after registering. Register for the promotion here.
  • Between November 1, 2017, and January 31, 2018, earn Silver Status after your first eligible stay after registering. Register for the promotion here.
  • Between November 1, 2017, and January 31, 2018, receive an e-certificate good for 50% off your stay, up to 2 nights, between December 15 and June 30, 2018 after your first eligible stay after registering. Register for the promotion here.
  • Between November 1, 2017, and January 31, 2018, earn 10,000 bonus points after staying 5 eligible nights, an additional 15,000 bonus points after staying an additional 5 nights, an additional 25,000 bonus points after staying an additional 5 nights, and 70,000 additional bonus points after staying an additional 15 nights. Register for the promotion here.