Previously, in amazon, when someone searched for a special kind of book that matched/related to my niche keyword of my business, my website would appear on "Customers viewing this page may be interested in these Sponsored Links". However, my site is not showing up anymore. I have both Yahoo and Google PPC engines set up and both have good CTR numbers. I believe my ads were appearing on Amazon because of google adwords or yahoo... but not anymore. How do I get back on there? Did Amazon break off from yahoo or google? Do I need to sign up with ClickRicker Ads? Thanks