I made a service that implemented Google AdSense type title and body text examination with the Amazon Product API to automate ad selection. Place a JS widget on a webpage and it would automatically examine body elements for keywords, dispatch a request to our server and find an Amazon product that was relevant, then inject affiliate ads on the page.

Then me and some associates applied the plugin to a massive network of content scraped wordpress sites which basically reposted stuff from RSS feeds. There was an art to making a site that has good SEO, would perform well in Google SERP, be just attractive enough that people wouldn't immediately hit the back button, but not completely satisfying so that they would be looking for more and click a link which would take them to the Amazon store.

Once they had our affiliate attribution set we didn't care what happened, if they made a purchase within the next 30 days we made money. And electronics was very profitable at the time.

A few times I got banned because my affiliate link was all over the place, like literally hundreds of sites, and Amazon wanted to control where the affiliate links were placed, not have them on sketchy semi spam websites.

Another time I got banned because I was using the product API in a way they didn't intend.