Why Lie Amazon? Prime Re-Eligibility

I got at email this morning regarding 'Prime' re-eligibility for FREE. It's legit. Check the last photo at the end.
And when I logged in it's not Free. Really? I honestly don't care about being Prime customer. But if you're going to offer me something, why not. What sucks is the bait. Annoying. Please never do it again. Don't tell me it's sold out BS since I never ask to have these promotions okay?