There used to be much debate around the affiliate practice of spamdexing and many affiliates have converted from sending email spam to creating large volumes of autogenerated webpages, many-a-times, using product data-feeds provided by merchants. Each devoted to different niche keywords as a way of "SEOing" (see search engine optimization) their sites with the search engines. This is sometimes referred to as spamming the search engine results. Spam is the biggest threat to organic search engines whose goal is to provide quality search results for keywords or phrases entered by their users. Google's algorithm update dubbed "BigDaddy" in February 2006 which was the final stage of Google's major update dubbed "Jagger" which started mid-summer 2005 specifically targeted this kind of spam with great success and enabled Google to remove a large amount of mostly computer generated duplicate content from its index.
Sites made up mostly of affiliate links are usually badly regarded as they do not offer quality content. In 2005 there were active changes made by Google whereby certain websites were labeled as "thin affiliates" and were either removed from the index, or taken from the first 2 pages of the results and moved deeper within the index. In order to avoid this categorization, webmasters who are affiliate marketers must create real value within their websites that distinguishes their work from the work of spammers or banner farms with nothing but links leading to the merchant sites.
Affiliate links work best in the context of the information contained within the website. For instance, if a website is about "How to publish a website", within the content an affiliate link leading to a merchant's ISP site would be appropriate. If a website is about sports, then an affiliate link leading to a sporting goods site might work well within the content of the articles and information about sports. The idea is to publish quality information within the site, and to link "in context" to related merchant's sites.
