But LinkedIn makes much of its money by charging an elite group of corporate recruiters big money for the right to sift through memberprofiles, hunting for great candidates to hire.
And in the center is LinkedIn's richest and fastest-growing opportunity: turning the company's 161 million memberprofiles into the 21st-century version of a "little black book" that no corporate recruiter can live without.
The Almanac offers a complete guide to the electoral map of Britain, with profiles of every constituency and a biographical profile of every member of parliament.