I read that post on Loyalty Lobby and then remembered that I had received an email this morning from Hyatt/Chase pitching the credit card.
I just double checked and the offer does promise Diamond status for as long as I'm a cardholder.
Here are the benefits the email touted:
• Receive elite Hyatt Gold Passport Platinum Membership for as long as you are a cardmember3
• No foreign transaction fees4 and Smart Chip technology
• Redeem for free nights with no resort fees, and with as few as 5,000 points at any Category 1 property5
• Receive 1 Free Night every year on your cardmember anniversary at any Category 1-4 property6
All for a $0 introductory annual fee the first year, $75 thereafter.4