Firstly its not free or easy money, if you want very little of it what i refer to has book and coffee money then its simple to use and depending upon your social circle and networking ability it can be just that.
If you want it to class as an income stream then it takes marketing, managing and work to help you get there.
A lot of companie son teh wbe offer this service, from ebay, amazon and itunes to independent design studios, large scale retailers and the majority of the porn industry.
The system is simple enough, create a web site => create an affiliate account => advertis affiliate products and stand back.
The reality is create a SEO managed website => create an affiliate account => advertise SEO targetted products and manage the links and return => repeat and manage infinitum !
Teh difference is hardly subtle but it is there, I use some affiliate linking across my differing sites and I make coffee or book money, maybe one or two £8-£15 books a year. No guarantee of income.
But the other benefit of these links is the SEO nature of them they are produced for you, they are always pretty good SEO links so they do have none direct commercial merits so think of this too before you discard the idea.
