However, aside from that, you can always opt to generate small amounts of cash flow by doing other things such as creating articles that will lead people to courses or audiobooks that you've developed, or building out video tutorials that will ultimately sell some big package or system that will help to teach people whatever it is that you're really good it.
Working with advertising networks isn’t your only option when it comes to selling ads. If you end up with enough traffic, advertisers may come directly to you and ask you to place their ad on your site. You can also contact advertisers yourself. The biggest difference from the above mentioned option is that there is no middle man, which means you can set your own ad rates.