So on many product pages over at Amazon there is a section titled:
Customers Viewing This Page May Be Interested in These Sponsored Links
and it has what basically look like Text Ads in a block. You can see them here right before the customer reviews: [amazon.com ]
I have someone who is interested in having their advertising show there but I can't figure out where the ads are coming from. The only thing I could find from Amazon was:
The Sponsored Links placement includes Amazon Clickriver ads for services and a range of products from third party ad networks. Sellers using third party ad networks cannot directly influence which products are included in this placement. The only way to ensure your products are advertised to Amazon customers is by using Amazon Product Ads
The ads all go through a9.com and of course all Clickriver stuff just points you to Amazon Product Ads. Does anyone have any info on this?