While a new feature on the world's largest social network is being seen as potential gold for advertising, privacy advocates and some users are raising concerns, USA TODAY reports. The new advertising format uses Facebook members' "likes" and other online actions to create promotional content in the form of "Sponsored Stories," which "became available for large brands to buy last week and is being rolled out over the next few weeks to Facebook's more than 500 million members." The Electronic Frontier Foundation is calling for an opt-out option for users. "Any time they make a change, people react, especially if there is a commercial element," says Future of Privacy Forum Director Jules Polonetsky, CIPP.
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