The document discusses a pre-roll video advertising network called Great Sites that rewards over 300,000 registered members for completing video views and surveys with entries into prize drawings. Advertisers on the Great Sites network only pay for proven video engagement and interactions from members, such as completed views, answers to multiple choice or survey questions, and opting into or out of lead generation. The network offers custom companion content and ways to enhance ads with features like wallpapers and competitions to increase member engagement.