As far as I know there a lot of the community here who are freelancers including myself, I had been doing this for a couple of years. Because, I cannot do this full time there are other things of course in which I need to do. But even I'm a freelancer, its not that I got profit sometimes when I joined in the bounties they have here. You just need to be determine, serious, and active here in the forum at your free time, just like that only.