Is blog commenting still effective?

[NehaChandaliya]

Definitely. You just have to reverse engineer things for most marketing questions. Just think: Getting a VERY powerful comment isn’t nice? It’s rewarding isn’t? You feel like your work meant something for someone. You feel like you’re making a difference. You feel awesome.

Look, business is about helping people. So doing this with a genuine spirit obviously pushes the other guy to keep producing more articles, you motivate him to continuously drop his ideas to the world.

Therefore, blog commenting is HELP for the other guy too.

[lisajohn]

Sure, there are spam plugins like Akismet, but it doesn't catch everything. Now, most blog comments contain the nofollow attribute in which they tell Google not to follow the link or drive any “SEO value” to that URL. But still, people still leave blog comments for the purpose of link building.