gambit3 writes "In a move to squeeze more cash out of its lucrative Web-search engine, Google is converting its free product-search service into a paid one. Online retailers will now have to bid to display their products on Google's Shopping site. Currently, retailers include their products for free by providing Google with certain data about the products. Google then ranks those products, such as cameras, by popularity and price. 'We believe that having a commercial relationship with merchants will encourage them to keep their product information fresh and up to date. Higher quality data—whether it’s accurate prices, the latest offers or product availability—should mean better shopping results for users, which in turn should create higher quality traffic for merchants.'"