Your annual fee date has no bearing on when features are added or removed, but all of the features you mentioned are still offered. They do periodically rearrange the web pages. If you have more than one American Express card, make sure that the site is still displaying information for the Platinum card when you navigate to the Benefits section.
Thanks. I purchased a flight for $99 last night. Will keep and eye out for the credit. Yes I was in the Amex plat view as I could see other benefits like digital entertainment, clear, Walmart + etc.