the s3 page has all links go to promocode.org https://s3.amazonaws.com/walgreens-photo-coupon/walgreens/in...
When you click on that you get redirected to promocode.org where you get re-prompted to click on the promo code and that's where the cookie promo gets tacked on the walgreens website.
I understand that amazonaws.com is a highly-ranked domain. What part of this process makes this particular s3 webpage rank up in search algorithms though? At the end of the day don't you need lots of _direct_ inbound clicks and links to this specific s3 page for it to rank higher?
The only way I see this working is if _indirect_ clicks of the entire domain count towards the ranking of this specific page -- that doesn't seem right though.
edit: looks like the paragraph above describes the concept of "domain authority" so that's probably the answer