I think Fiar has done a good summary of how these things happen. If you comment on a regular basis your name will begin to register both to the readers of the blog and the author of the blog.
This will encourage traffic to your blog assuming that your comments have value and interest.
I'm not sure whether the figures you quoted were a 'one-off' or gradual increments for the blog you were looking at but if you make a comment on a heavily trafficked blog then the chances are that you will receive a spike in the number of visitors as a result. The trick then is to provide content on your blog that will interest them enough to return for more.
Actually, of course it's not a trick, it's good penmanship. |