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News Summary: Does advertising on Facebook pay?

Associated Press Modified: May 16, 2012 at 5:30 pm •  Published: May 16, 2012

MORE TO OFFER: Facebook is responding to extraordinary demand and says more stock will be offered in the company's initial public offering.

AUTO DEBATE: A debate is emerging between two of the nation's largest automakers on whether it pays to advertise on the social network. General Motors says it will abandon Facebook ads after concluding they were ineffective. Ford reaffirmed its commitment to Facebook.

AHEAD: The company's stock is expected to begin trading Friday on the Nasdaq Stock Market under the ticker symbol "FB".