FYI, I see new Amazon Fresh/Whole Foods offers again. I have them on both my CSR and Freedom Flex, wife has them on her UA Select. Interestingly enough, my UA Select doesn't have an offer on it (she doesn't have and Freedom cards).
Offer terms are the same as I've seen the last times I've gotten these...20% off, up to $12. We've used all the ones we've gotten before, pretty much to the max, and unlike some others, we truly get value from these. A note: IME, these offers have been a bit of a PITA, and definitely take a little longer to credit than most. Sometimes its taken a message via Chase secure messaging, but I've always in the end got the full credit (in this last case, Amazon somehow split my single purchase into two transactions, so had to write in to ensure the whole thing was credited).