Ralf Ahamer, CMO of XING AG, discusses opportunities and risks of social networks for businesses. He outlines XING's business model of generating revenue from premium memberships, recruiting services, and advertising. Social networks provide opportunities for advertising within the new media landscape. Businesses can also generate revenue from virtual goods and subscriptions if they offer professional networking services valued by members. However, most brand communities on social networks fail, so leveraging existing popular networks like XING and Facebook may be more effective.