In June 2016 we reserved a room at the Polynesian for Late September 2017. I also ordered the Planning dvd - in hopes of getting offers. On 10/13/16 I received an email with UOC code for Aulani - 40% of Ocean View rooms Book now through 10/31 for stays between 10/30/16 and 12/22/16 (excludes Thanksgiving weekend).
Although we won't be able to use it, I was just so happy to get one at all. It gives me hope I may get something for our time frame.
My second thought was that's really short notice! I bet if I were to receive one a couple of weeks prior to my check-in date, I would end up having to upgrade my room class or change resorts entirely. Not sure it would be worth it, but I would certainly look into it!