commenting on good blog still worth but commenting on bad blog can make your site get penalty by Google
Hello Yes, still worth. But its all depends on the quality and relevancy of the blog that you are going to comment. Do not spam irrelevant blogs.
Agreed. Comment as if you actually care about the article and then slip your url in every so slightly This is such a great subject I mean, a website like www. google.com would be highly amazed by such incredible selection of topics. ;D
Yeah absolutely it still works but animadversion alone on those blog which comes from your niche.Huge commenting on accepted blogs can be penalized afterwards penguin updates.