Blogs implement a capitalist attention market. If you want attention for your blog you have to earn it through a combination of quality, in the sense that you’re producing something valuable for your readers, and trust, in the sense that you’ve produced enough good stuff over time to establish a good reputation with the fellow bloggers whose links will help grow your audience.
Social media, by contrast, implements a collectivist attention market, where the benefits of receiving attention are redistributed more uniformly to all users.