Looks like posted to my account. Said "Happy Twitch Prime". Used it on a frying pan lol.
when i first got the email stating there was credit it showed up and then disappeared. i wanted to buy something today and noticed wasnt there. i hit up the chat and basically explained to them and copied exactly what the email said
" As a thank-you for purchase on our select titles, Twitch Prime added a $15 gift to your Amazon account. This credit expires on December 31, 2019. We'll apply this credit automatically when you make a purchase between now and December 31. "
They had someone else look at it and said should hear something in about it soon. most likely 24-48hrs. we will see.