3 separate earning sites connected to the main one that earn 1 point for viewing 20 second videos/ads.
Each point earned counts toward a percent in a shared member pool and a chance to win prizes such as .10-.30 BTC and a $25,000-$100,000 car
(though there's only ~$1,300 in each pool for these right now).
 
http://www.bitbillions.com/?refid=1N43qB8ED2UuFNLpdDq95JgrNYWubrRHDB