How to Reward for a Facebook "Like"
One of the first things many people ask for is the ability to award points for "liking" a page on Facebook. Unfortunately because of Facebook's rules and restrictions, apps aren't allowed to verify completed actions on their website.
We know Facebook likes are really valuable for merchants and have coordinated with some merchants to study a really successful workaround!
Through some observation, we've noticed that when merchants name their campaign "Like our page on Facebook" and make all information convey that a Facebook "like" is the required action, nearly all merchants will go ahead and complete the action of "liking" your page.