In 2011 I wrote a short post about DeepDyve, a service where you could rent access to an article. DeepDyve has launched a "5-Minute Freemium" service where you can view an article online for 5 minutes, for free. You have to log in, either with DeepDyve or using Facebook, but no actual money changes hands. If you want to read for longer, or download an article then you have to get out your credit card.