LinkedIn launched, officially, in May 2003. A month later, the network had 4,500 members.
Third quarter last year (2016, if your calendar is slow), LI had 467 million members worldwide; in the United States, LinkedIn membership approximated 135 million. Overall, about 106 million members visit the site each month — a great many potential contacts looking these days nearly as often for products and services as jobs.
Photo credit: Punkmedia.nl via Visual hunt / CC BY-NC-SA
