Social Media Report: Social media drives salesespecially when combined with PR Fast-food customers who are exposed to a brand’s social media presence spend more money in a week, a recent study has found. Add PR, and they spend even more. By Kevin AllenOct. 21, 2011 SHARE Ragan Insider Premium Content To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.