So commenting on a blog vs a person putting your ilnk on their site, if they never take the post down, is the blog post worth as much backlinking power as a blog comment that doesn't have nofollow on?
most of the blogs are using nofollow to prevent the comment spam because of this , blog commenting is a dead way for link building
I have been posting in some blogs related to my site and I have noticed some traffic. So in my eye's even if it doesn't do anything for my PR, free traffic is still free traffic.