Via Mark Coatney, Tumblr media outreach director:

  • Tumblr does not publish follower count "as we always felt it wasn't a healthy number to focus on". "From our perspective the most important number is really the number of re-blogs that your post gets, because that's an indication that someone likes it, and is spreading it out to their network. "It's much better to have 100 re-blogs of your post than to have 10,000 followers if they are not re-blogging and actively promoting and engaging your stuff rather than just absorbing it."