Saw this on another site:
The link for the offer is
http://www.hyatt.com/content/partnerlandingpage/en/promo-intro.html?Personally i was targeted for the best offer (65K points after 25 nights) but that may not be the best offer for you.
On the landing page you need to enter your Hyatt Gold Passport number.
After doing so they will show your offer which is targeted.
Once you see the initial offer DO NOT HIT REGISTER
Change the hyperlink:
http://hyatt.com/content/partnerlandingpage/en/65KSTAY25.html?gpNumber=[YOUR GOLD PASSPORT NUMBER]&_requestid=339824
Remove the [YOUR GOLD PASSPORT NUMBER] and enter your own Hyatt Gold Passport number and change the 65KSTAY25.html to something like
http://hyatt.com/content/partnerlandingpage/en/20KSTAY10.html?gpNumber=[YOUR GOLD PASSPORT NUMBER]&_requestid=339470
That will give you a 20,000 bonus point stay for 10 nights "20KSTAY25"
2k points 1 stay for: 2KSTAY1B
5k points 2 nights is: 5KSTAY2
For the tiered offer of stay 20 nights for 50000 points is: 50KSTAY20B
Stay 5 Nights
Get + 5,000 Points = 5,000
10 Nights + 10,000 Points = 15000
15 Nights + 15000 Points = 30,000
20 Nights + 20,000 Points = 50,000
The best offer (IMHO for those who will have enough nights) is the tiered 65KSTAY25
15 Nights + 30,000 Points = 30,000
20 nights + 15,000 Points = 45,000
25 Nights + 20000 Points = 65000
