I know this might be a tall order but... it doesn't hurt to ask, right? I'm looking for a WP plugin that locks my content unless people SHARE the content on their FB wall. Notice I said SHARE not LIKE. Anyone know of any such plugin? Here's something that looks similar to what I have in mind
There's social content lockers with share function, but I never saw it for free. They usually have that as paid option, or are sold for $19 on themeforest. Just search themeforest for social content locker and you'll find few of them immediately.