The Facebook headquarters in Menlo Park, California. Facebook said Thursday it was revamping its "Offers" service, by making companies pay for what had been free advertising until now. With the social... more 

The Facebook headquarters in Menlo Park, California. Facebook said Thursday it was revamping its "Offers" service, by making companies pay for what had been free advertising until now. With the social network giant struggling to prove it can boost revenues, the change requires payments, starting at $5 per ad, for the deals offered through Facebook less