Update: As people rightly point out, this is the standard language in AmEx offers. Fingers crossed this means the credits will post well before the 6/30 date.
American Express just released a lot of good AmEx offers for personal Platinum cardholders, for example:
One thing I didn’t really notice when first posting is that the terms state:
The enrolled Card account must not be cancelled or past due to receive statement credits . Statement credit will appear on your billing statement within 90 days after 6/30/2021, provided that American Express receives information from the merchant about your qualifying purchase.
This means you’ll need your card open at least until 6/30/21 and possibly until the end September. It might be worth checking to see when your card renewal date is and deciding if you’re going to keep the card. I suspect American Express won’t be offering generous retention offers based on all these credits/offers so it might make sense not to use these offers if you’re going to cancel your card or waiting closer to your renewal date if it’s before 6/30/21 to see what offers you get.
Hat tip to simeon