There’s also a social aspect to it. If you find writers that you enjoy, you can follow them on Hubpages, and their latest articles (or Hubs, as they are called) appear on your feed.
Hubpages also has its own ad program, which is easier to set up than anything else. The Hubpages ad program is where I’ve made the bulk of my (paltry, to be fair) earnings on Hubpages.