I received this same e-mail as well and confirm it says Diamond status in addition in the fine print
"3 Diamond status valid as long as your Hyatt Credit Card is open and not in default and you comply with Hyatt Gold Passport program rules. Authorized users will not be eligible for Diamond status or associated Diamond benefits."
No mention of either Platinum or Diamond benefits in the e-mail to distinguish which one is offered. Says I must apply by 12/12/13.
If this offer is indeed confirmed and not in error I will definitely apply. Anyone have thoughts on if it would be honored? I will be requalifying for Diamond status this year either way but would be less stress in subsequent years.
Edit: It did not come from Chase but received from "
[email protected]" so maybe Hyatt directly?