QUOTE(mari86 @ Jan 21 2013, 01:29 AM)
Profile link building is a worthwhile SEO technique lately in use. In profile link building, you create user profiles on various forums, blogs, social media, message boards, guest books and web 2.0 sites, etc. as most of these sites allow you to add your site URL and description, and so you can add your site URL along with a few anchor text links on these profiles. Thus, profile link building utilizes the authority of popular third party websites for the sake of building backlinks to the target pages.
For getting profitable results in building profile links there are some important things to be considered.
First, the profile page should be open to search engines and non-registered users. Second, the homepage must have a good PR. Third, the profile links must be DoFollow. And finally, the site must allow for anchor texts.
I am agree with you.