I read peoples blogs to leave quality comments if they allow it and to leave "back links" which will improve my search engine ranking and generate more traffic to my web-sites.
you can learn a lot from reading blogs. A lot of bloggers loves to share their knowledge through their blogs.
People only read BLOGS for valuable contents. If your BLOG provides ideas, information or simply entertainment, then it will generate more readers. Reading is food for the mind and it keeps our brain functioning. Also, it could generate profits! wink~