I have a reservation for Labor Day weekend at the DT Key West and have been debating whether to use $ or points. If they are participating this will make it an easy decision.
Also have two weekend nights in October at Grand Wailea who seems to participate in these promos - that should work out really well with this + the WA promotions. Unfortunately I missed signing up for the 10K promo and I just had a WA stay two weeks ago.