I logged onto www.topcashback.com to make hyatt reservations today (January 30) and noted that Hyatt's 3% back is ending in "3 days". I'm not sure is that includes today, January 30 or not. See: http://www.topcashback.com/hyatt-hotels-and-resorts/ AFAIK, top cash back is the only rebate site providing cash back for Hyatt. I won't post my top cash back referral link, but I'll happily send one to anyone who messages me.
Reached out to them and they said it is going up to 4% for a limited time next week, so assuming that holds this is a good (temporary) change.
We offer min 3% back but in gift vouchers not cash. Not as easy as Topcashback but an option nevertheless.
Well, I feel like a fool now, as I hate to cry wolf. Hope the community appreciates I was trying to convey useful information and not a false alarm!