Checking to see if a blog is dofollow requires inspecting the HTML of the blog to check the links to commenters (see how to verify a dofollow blog). Furthermore, the list of dofollow blogs is always changing as blogs turn dofollow on and off. Since each blog’s HTML template can be different, the only reliable way to verify dofollow is to have a human check it. At PageRush, we have multiple humans check each link that is submitted. We strive to re-check each dofollow blog on a monthly basis to confirm that it is still dofollow.