Of several overlapping IHG promotions in late 2016, there was an IHG Priceless Experiences one to qualify for a Mastercard gift card based on your stays and brands.
Like me, you may have registered and forgotten about it. Turns out I qualified for a $75 reward card. You must claim it to get it.
Go to pricelessexperiencesredemption.com and see if a reward is waiting for you. Deadline to claim is 3/31/17.