Google seems to be testing showing a promotion for Amazon Prime membership directly in the Google Shopping search results interface. It is this line that has a small Amazon logo and says “Amazon Prime member benefits: Prime members get fast shipping on eligible items, exclusive deals & more.”
This also works for Nike membership.
This was spotted by Menachem Ani who posted on X about it. I am able to replicate it.
Here is a screenshot showing the promotion (click to enlarge):
Here is a screenshot showing the overlay after you click on the promotion line (click to enlarge):
When you click on any of those “join now” links, it takes you to Amazon to buy Prime membership.
This also works for Nike membership as shown by Feedarmy:
I wonder what that ad costs?
Forum discussion at X