Amazon.com has just entered the testing phase for its own network of third-party contextual ad links. The idea is to compete with Google’s established AdSense network, the newly launched Yahoo! Publisher and MSN AdCenter, as well as to expand the presence of Amazon.com in the online world. While the site has surpassed its humble beginnings as an online bookseller to become the epicenter of e-commerce in the past decade, the company sees ad sellers like Google as middlemen impeding upon potentially profitable territory.
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