Amazon has been a great income earner for affiliates for many years, but changes to a variety of factors such as SEO and the habits of your typical web surfer have made it a much different environment than it was a few years ago.It was once possible to create micro niche sites that focused on a very specific niche subject, or even one single product, and make very good money. Google seemed to love those micro niche sites, and it was very easy to rank them and make a lot of money quickly.