Affiliate marketing owes its birth and first developments to CDNow.com and Amazon.com. Back in November, 1994 CDNow started its Buyweb Program — the first online marketing program of its kind at that time. Amazon continued this pattern in July 1996 with its Associates Program. Amazon claims that currently the number of their affiliates worldwide exceeds 1 million associates. (A Practical Guide to Affiliate Marketing, p. 11)
Well duh! If you don’t add affiliate links and banners into your content then how do you expect to make sales? When people fail to make money when affiliate marketing, it is usually because they are not discretely monetizing all opportunities. People DO NOT care if you have a few links and banners on a website, in fact they expect it. Especially when they get interested in a product and want to see more. If they have to go and search for the product themselves, they hate that.
Affiliate marketing is a technique that involves inter-brand cooperation in promoting a good or service. In one of its simplest forms, affiliate marketing consists of one brand, company or individual promoting a product (likely in exchange for some sort of commission) on behalf of another brand, company or individual. Its intended function is to expose one brand to another’s customer base, and is typically done when there is some sort of similarity between the two brands that might draw common interest. The rise of the internet has enabled a diverse range of opportunity in affiliate marketing, largely by way of data tracking (such as web cookies) and analytics.
You should also make sure you aren't competing with your own affiliates for eyeballs. Any marketing channels you're using, such as search engines, content sites or e-mail lists, should be off limits to your affiliates. Put marketing restrictions into your affiliate agreement and notify partners immediately. It's your program--you set the rules. Or, if you prefer, you can let your affiliates run the majority of your internet marketing.