It's not really a sales affiliate system.
You are paid for clicks, you are a publisher paid for allowing presentations to your visitors, you are Not supposed to promote what is advertised in Adsense, you provide content that attract potential buyers, a Camera review page will be recognized by Google and will be given Camera advertisements, which makes the page pay better than a cute pet photo gallery.
Its an affiliate program with commission paid on actual sales achieved and not a Click Per Action system.
You get paid for every sale
https://affiliate-program.amazon.com/gp/...
Does amazon affiliate program pay you, if you promote product links, and you get clicks, (pay per click) for people visiting the link, or only if someone ends up buying the product you promote?