The “free” economy comes at a cost | consumer psychology | Scoop.it
From www.economist.com - August 31, 2017 1:29 AM

"FACEBOOK, whose users visit for an average of 50 minutes a day, promises members: “It’s free and always will be.” It certainly sounds like a steal. But it is only one of the bargains that apparently litter the internet: YouTube watchers devour 1bn hours of videos every day, for instance ..."