Social Media Dunkin’ Donuts year-end push on social media set records The coffee-and-pastry chain ended the year with a flurry of contests and promotions that resulted in record participation rates. By Matt WilsonJan. 8, 2013 SHARE 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.