In a discussion/promotion for his business at LinkedIn, Mike Nobels writes that Facebook users spend a total of 5 billion minutes there every day.
That’s 9.5 people-years per day spent on Facebook. I don’t know the source of his information and I haven’t bothered to look at how many people use it; I don’t know the average time spent per user. I don’t even know why this is meaningful.
But it amazes me nonetheless.