My friend told me about Helium sometime ago. I joined but never really look into it. If you are good at writing great articles and keen to earn some money, you may give Helium a try. It’s not like writing paid post. There is a community which will rate your article and if it’s selected, you will be paid. The payout is quite attractive as their partner publishing are paying USD20 - 200 of each selected article, so if you are good at writing, go for it.

I’m not good at producing 500 words article, so I have never written anything there. But if you are willing to join, hop over to Helium. It might be a great freelance job.