I have a blog of my own and the only way I am gaining some bit of money there is if someone clicks on each one. Every time someone clicks on the links in each article, I earn something like a few cents or so. I know it’s not much but it all adds up. Besides that option, there’s also places that pay blogger. For example, back in 2009, I was using Blogger (I no longer use that one since my current one with WP is even better). I got paid $5 each by Blogsvertise. You should look more into it.