The document discusses conceptual models for social advertising platforms. It describes how platforms like GoogleAds, Facebook, and YouTube currently use advertising models focused on quality scores, user targeting from profiles, and branding possibilities. It also discusses new trends like Digg allowing users to vote on compelling ads or bury bad ones, and Twitter measuring ad performance factors like retweets to determine pricing. The document argues that conceptual ad platforms should only allow compelling ads and advertisers must have compelling creativity, in order to develop trust from users.