I run several sites with the same Amazon code it it and I noticed in Google analytics that somebody searched for this: "linkdomain:e-accessories.net -site:e-accessories.net" According to this: http://www2007.org/papers/paper111.pdf a double-funnel is used to detect spam blogs: "We propose a five-layer double-funnel model in which displayed ads flow in one direction and click-through traffic flows in the other direction." 6.1 BLOG FARMS The web page at http://urch.ogymy.info/ is a commonly seen made-for-ads blog page that consists of three parts: a list of ads, followed by a few programmatically generated short comments, followed by a long list of meaningless paragraphs designed to promote several randomly named .org and .info URLs sprinkled throughout the paragraphs. By issuing the following queries – "Welcome to my blog" "Hello, thanx for tips" phentermine domain:info, as well as “linkdomaingymy.info†and “linkfromdomaingymy.info†– we found 1,705 unique pages that shared the same format and belonged to the same blog farm. By visiting each page and analyzing the ads URLs, we found that all 17,050 ads forwarded click-through traffic to 64.111.196.117, which was #12 in Figure 7 and #7 in Figure 11. -- I then checked Google analytics for the day the search was performed against the map locations. There was one click from an IP address near Seattle, Washington, where Amazon's headquarters are. Do you think that Amazon checks for spam link farms for those using their affiliate program by using the double funnel technique?
Amazon cuold checking this kind of thing, but it would not really help them. This is more of an SEO technique for traffic - Amazon get sales at the end of it all so they are happy. If google were investigating this then I wouldn't be suprised... As a side, just don't use dodgy techniques to make sales. There is no need - offer value to the customer and you have a long term, sustainable business.