I just want to bring to your notice an innovative way in which companies are using Facebook to increase user engagement and promote their products as well - by use of contests on Facebook. It works in a very simple manner - the users have just to like their Facebook page, and complete a fairly easy task (writing a slogan or playing a game).

For example, here is a recent contest by LG Malaysia, where users can win LG Optimus G smartphones - https://www.facebook.com/LGEMalaysia...36949709807879. Have any other users noticed anything similar, or even participated in it?