LinkedIn is riding high as an enterprise network, used by larger institutional clients—headhunters, human-resources departments—to browse and scout talent. And its success is part of a broader trend: the online triumph of business-to-business (B2B) commerce over business-to-consumer (B2C) marketing.And:
For every hour a Facebook user spends on the site, Team Zuck makes 6.2 cents. LinkedIn makes 20 times that
(via Why Investors—But Not Consumers—Love LinkedIn - The Daily Beast)