For people who want to sell writing services
"Earn Up To $80 Per 500 Words Once Promoted Up The Ranks"
https://www.iwriter.com/ (No affiliation)
Also I found this which I think is pretty cool if you are keen, but your content has to be accepted first. But there is so much you could write on.
Top 10 Lists - Listverse (No affiliation) pays up to $100 for your lists if they are accepted. Even if it took 4 hours to write that list, it would be worth it for a hundred bucks.
I have also used and sold on "Constant content".
What are some of the sites other warriors use?