The 25 Most Popular Tumblrs Reveal the Challenge for Yahoo!

David Karp of Tumblr at TechCrunch Disrupt NY 2013 Photograph by Brian Ach/Getty Images for TechCrunch

Yahoo! has purchased Tumblr at a particularly difficult time in the life cycle of a Web startup. The users are there, creating and reading posts, asking the company for nothing except reliable server performance—and nothing in the way of major changes. Now it falls to Yahoo to figure out how to turn that traffic into revenue, a problem that continues to bedevil pretty much every popular social-media property on the Web.

To continue reading this article you must be a Bloomberg Professional Service Subscriber.