Social Locker is a WP plugin that locks your most valuable site content behind a set of social buttons until the visitor likes, shares, +1s or tweets your page. It helps to improve social performance of your website, get more likes/shares, build quality followers and attract more traffic from social networks.
Demo http://codecanyon.net/item/social-locker-for-wordpress/3667715
Downloadhttps://www.filecad.com/uL7O/Social-Locker-for-WordPress-v5.0.8.rar