Just to clarify something that was asked upthread -- for a stay that straddles the beginning of the offer period, only nights during the offer period count. I had a stay Aug 31-Sep 3 and it counted two nights towards the promo.

I know this because after that I had a 3 night stay ("Stay #2") 2500 pts posted, and then after that I had a 4 night stay ("Stay #3") and nothing posted. Then I got my additional 5k after my following stay.

If 0 or 1 of the nights of Aug31 - Sep 3 counted, I would not have gotten the first 2500 pts after stay #2 . If all 3 nights had counted, I would have gotten 5k points after stay #3 (as my total would have been 10). Therefore I can conclude that exactly 2 nights were credited from my Aug31 - Sep3 stay.