When does my Amazon Gift promo code expire?

Please see the terms on the original offer page.

Amazon Tech Pack

When will I receive my Amazon Tech Pack code?
How do I qualify for the Amazon Gift offer?
Why haven’t I received my Amazon Gift promo code?
When will I receive my Amazon Gift confirmation email or text?
When does my Amazon Gift promo code expire?
I ordered my Amazon Gift, but I don’t have it yet
I received my Amazon Gift and followed the instructions correctly, but my promo code isn’t working. What should I do?