What does it take for an ad campaign to become a marketing blockbuster? In this fractured attention economy, no longer does it suffice to be a pretty face hawking miracle creams, luxury SUVs or top-shelf spirits. CMOs are following the movie publicity playbook by hiring Hollywood-founded agencies (Ryan Reynolds’ Maximum Effort, Ben Affleck and Matt Damon’s Artists Equity) and eschewing traditional ad buys in favor of social media virality and user-generated content (UGC), both of which promise exponentially higher ROI. Reynolds’ latest culture-jacking marketing master class arrived with Astronomer’s crisis PR campaign that capitalized on the tech company’s spotlight post-“Coldplay couple.” Nine days after the kiss-cam moment that solidified two divorces, Maximum Effort deployed a deadpan “fastvertising” spot strategically starring Gwyneth Paltrow, former wife of Coldplay frontman Chris Martin, who explained to 36.5 million viewers across social media how your office was “the best place to run Apache…