In 2013, Coca-Cola made a huge content marketing gamble. It replaced the content on its corporate website with "Journey," an online magazine telling brand stories in Coca-Cola's positive brand. Three years later, the website boasts 5 to 6 million views per month - but that's not the site's key indicator of success. Doug Busk, the brand's global group director for digital communications and social media, shares what Coca-Cola has learned by thinking like a publisher.