Website paywalls work, except when they don’t

Paul Carr of NSFWCorp on the problem with some paywalls:

Porous paywalls for journalism make as much sense as a coffee shop giving free lattes to anyone who comes in just twice a week but then charging fifty dollars a cup on the third visit. That’s a hell of a loyalty scheme, and a great way to encourage people to settle for just a couple of free cups of coffee rather than drinking more and having to pay.