Social Content Locker is a nice and simple add-on to drive more attentive traffic to your social profiles and websites.
Lock your website content with this tiny add-on and unless a visitor likes or shares or tweets, they wont be able to see the content behind the wall.
Once they do, the article automatically unlocks. Highly configurable and backed with a 24×7 Customer Support package.
This plugin is cross browser compatible and works on all the modern browsers. Bug Free and works great! Compatible with Joomla 2.5.x , 3.x.x..