Here's an interesting twist on this promo:

I had a stay at a participating hotel. However, my folio was high enough that I thought the additional 5 HHonors points was better than the 1.0 WN credit. I therefore went points & points. What did I get? 25 points/dollar. 10 base; 5 diamond; 5 my way; and 5 WN Double Credit offer.