Comment in External Nofollow Blog Can Increase Your Link Popularity

I see that many masters use external nofollow in their blogs. I think what are advantages of using external nofollow in a blog for readers. One advantage of using external nofollow is can improve commentators's link popularity. Because by commenting in external nofollow, commentators's links will be indexed in Google Webmasters Tools, Yahoo, Alltheweb, and Altavista. I often comment in one of my favourite blog "Dailyblogtips.com", and you can see the result below :

External Nofollow in Google Webmasters Tools

External Nofollow in Yahoo Inlinks

External Nofollow in Alltheweb Link



External Nofollow in Altavista

So Let's comment in dofollow and external nofollow blog.