It Helps in building bonds with like minded people:

If you are a blogger and frequently comment on other blog posts, at some point in time the author will notice your interest in his/her blog. This helps you to build up your circle of like minded people (bloggers). You get a regular reader and also some good things to read regularly. Also helps to build up traffic in sufficient time. Shoutmeloud explains…

Constant bombarding of small comments never works. Commenting has a proper protocol, it must be something which adds to the content of the post. Or it can be a hearty acknowledgment. Criticisms are desirable if put forward in a polite manner.

It can get you a free ad slot:

AnimHut runs this great offer every month. End of every month the top commentator on the blog is awarded with a free adslot for the month. This month it is giving away two such adslots.

It helps to build backlinks:

Commenting makes an active link on the page you comment. This builds a backlink that is tracked by web crawlers if the link is dofollow type. Nowadays the search engines and ranking websites heavily depend on the backlinks to rate a website. It eventually helps to pump up your blog’s rank.

I was unaware of the default no follow on wordpress engine. By default all the links on a unmodified wordpress blog are ‘NO FOLLOW’. This means, the links do not count as backlinks. This isn’t very encouraging to maintain relations in the blogger community. As the links don’t provide backlinks, people won’t care to get their links on your blog. The blog with no follow links would lie un-noticed in the community due to lack of backlinking.

To make a wordpress blog a DO FOLLOW blog the simple way. Download the plugin – DO FOLLOW plugin. Then activate it.

via [Hellbound Bloggers]

UPDATE: First of all, the plugin won’t work with Disquss and I love Disqus. Thanks to namanzone. I’m not uninstalling Disqus neither trying to “do follow” now. There is no doubt comments help drive traffic and build relations. It is pretty lame for people to not comment just because their links won’t get followed by search engines. NO FOLLOW on wordpress is there for some reason. At least I won’t get bombarded with infinite spam. Do Follow stays for now.