Is Tumblr the new fashion frontier in social marketing and influence? Approximately 180 of the top 1,000 Tumblr blogs are fashion related, Tumblr founder and CEO David Karp told Mashable. What’s more, fashion-related Tumblr posts are reportedly reblogged on a much greater scale than general Tumblr posts and are therefore much more likely to go viral. So it follows that Tumblr has a vested interest in cultivating their fashion-following usership. We recently broke news that the image-heavy social media platform had hired a fashion director, Rich Tong, and would be sending 20 of its bloggers to New York fashion week. Now, more and more fashion brands are increasing their reach by joining Tumblr.