The bonus thresholds are as follows:
Buy 1,000 – 9,000 points and get a 10% Bonus
Buy 10,000 – 29,000 points and get a 20% Bonus
Buy 30,000 – 40,000 points and get a 30% Bonus
As a reminder Gold Passport points ordinarily cost 2.4 cents each, and you can purchase a maximum of 40,000 Gold Passport points per year. So if you’re maxing out this promotion with the 30% bonus you’re paying just under 1.85 cents each. I value Hyatt points at 1.6 cents each, so this is still a bit more than I’d pay for them.
That being said, if you have a specific use of points in mind, this can be a great deal. For example, Hyatt’s top hotels go for 22,000 points per night, so at 1.85 cents per point you’re paying roughly $400 per night for that. That’s an absolute bargain compared to the paid rates at the Park Hyatts in Paris, Zurich, the Maldives, etc., so can be worth considering if you’re looking for a discount on a luxury hotel stay.