Am I wrong in thinking the only thing this does is protect Facebook's financial interests? Don't they profit from the proper app and ad based mining and selling

Am I wrong in thinking the only thing this does is protect Facebook's financial interests? Don't they profit from the proper app and ad based mining and selling of this information anyway? There are so many references to the underground background checking methods employed by legal abuses of social networking, wouldn't it take a huge chunk out of their business model to have individuals simply show the information directly to employers, free of charge?