Usually these offers are just a ploy to get you to a site where you are asked for a credit card # in order to receive the prize. Your information is then used for nefarious purposes. In the social media version, users take a quiz and must supply their cell phone # to receive the results. In actuality, they are setup to get fake charges on their cell phone bill.
Information supplied by Matt Geelhoed, President of Spyridon Technologies – a web hosting and internet solution based company located in Grand Rapids, Michigan.