Excellent find. This thread is fairly old now and the deal is still there. It said on the first 77 reservations on the web page. Either this is a Hyatt state secret or the 77 reservations was just a ploy.
I did get one tonight, though. Not sure if I'll be able to use it but plan to be in eithe rSAN or SBA over the 4th. Close enough to reserve just in case. With a 24 hour cancellation policy, this is one worth a just in case.
And to the question about stay credit. There's not even a special promo code I don't think. For all intents and purposes, it looks like any other rate to me. I will ask GP just in case. It's not worth the effort to me for 1 night if ther eis no stay credit, but I can't see any reason why that would be the case.
Will post here if I findanything more.