bloggers dont work the same as BUSINESS blogs
there a lot of amateur sites out there - which were called blogs to begin with before everyone and their grandma got one to to start making money of them .. bloggers naturally just linked other sites they liked - check out
www.blogroll.com - its a tool for bloggers that when they find a site they press a button in their browser and it auto adds another site to their own blog instantly - because they like - thats how the blogoverse works