Not all Amex Platinum Card benefits are automatic — several require you to activate or enroll before you can start using them. These include: Choosing an airline for the annual incidental fee credit Adding your card to your Uber account to receive your monthly Uber Cash Enrolling for the Saks credit Registering for Marriott and Hilton Gold status and rental car elite status Enrolling for the digital entertainment credit Signing up for Equinox through Amex You can follow this checklist of things to do when you receive your Amex Platinum card so you don't miss out on perks.