As of July 15th, 2013, Ad Age has shut down the Power 150 service. While you’ll still be able to view our final rankings, they will not be updated in the future. We will also no longer be accepting new blogs. If your blog was waiting to be accepted, we won’t be reviewing it for inclusion. For the time being, you can still search the list and download an OPML file of all the current blogs.
Why are we shutting it down? Since we took over the list from Todd Andrlik in 2007, conversations on marketing have broadened their reach well beyond personal blogs to Facebook, Twitter, LinkedIn and many other places. If blogging lowered the barrier to entry, social media obliterated it. Because of that, and with more holistic influence measurement tools like Klout, the Power 150 is less relevant and powerful than it was six years ago.
And in practical terms, with social media APIs ever-changing and new sources of data appearing at a regular clip, we’ve decided to put our resources into interactive data projects like our Viral Video Charts or our YouTube Channel Tracker.
For fans of the service over the years, we thank you for joining us and providing so much valuable feedback and enthusiasm. To wrap things up, we thought we’d let Todd Andrlik, original creator of the list, have the last word. His comments — and a plug for his new book — are below.