It has been a week now, I have actually commenting to 100 – 200 blogs a day. The Alexa daily ranking and weekly ranking is still below 1,000,000. As far as I know, Alexa still counts traffic that is coming / referred from comments id url.
On my first attempt a few weeks ago, my Alexa ranking boost up to below 30,000 on daily ranking. Then, I let go the commenting part again, the ranking drops higher than a million now. So, my guess is commenting really contributes to Alexa ranking. Maybe, it will take a few days or weeks to see the changes.
Why don’t you try to comment on 100 blogs a day and constantly do that for a week? Share your experiences here. Anyone actually have tried this before? What is the results you get from commenting to other’s blog?