I got the following email from Hertz.

Act now to keep your Five Star status
Your Five Star® status will expire soon, but we have good news. You have been specially selected for a one-time opportunity to maintain your status with points you’ve already earned.
For only 2500 points, you can keep your valuable status through 12/31/18.
Simply click on the link below to redeem your points and you will receive a confirmation email about your extended status. But hurry—this offer expires 4/17/18.

Has anyone else received this? I thought 5 Star was included with the Amex Platinum Card. Has it changed??