I don't think people are doing anything sketchy. They're asking did your browser go amazon.com -> search evo 850 -> evo 850 product page -> post "add to ca

I don't think people are doing anything sketchy. They're asking did your browser go amazon.com -> search evo 850 -> evo 850 product page -> post "add to cart" or did your browser do evo 850 product page -> post "add to cart" or even post "add to cart" those are sorted in decreasing order of naturalness. Obviously #2 can happen if you got a link directing you to the product page, but it's still less natural. You would often expect to see the referrer be an email domain or similar.