In her recent post, Jennifer Van Iderstyne tackles some misconceptions about linking. In it she confirms what I have always believed that there is no such as a “worthless” link. What do I mean? Well even a no follow link through blog commenting or social platform as well as multiple weak directory link give the googlebot some info about your site. By sending these types of links to your site you lay some basic link foundation that will enable more powerful links to be used to push you site.
These links can also give your site a little cover. If you work with clients that don’t want to let the world know they have hired an SEO, then these “worthless” links go a long way in hiding your linking scheme and and network.
So I have to concur with Jennifer…there is no such thing as a “worthless” link.