1. Facebook would probably need to somehow indicate that a post has been "highlighted", lest they lose legitimacy and breed distrust. 2. Users probably wouldn'

1. Facebook would probably need to somehow indicate that a post has been "highlighted", lest they lose legitimacy and breed distrust. 2. Users probably wouldn't want their friends to know they paid to highlight a post. I'm not sure how those forces can be reconciled, unless people generally don't care about one [logical OR] the other.