I've been on here since Nov 04, 2014, and have a gross revenue of 982.55 USD. I've been making games full time for most of that time, and most of my income comes through Steam or crowdfunding. I also don't have anyone else I have to support or look after, and I've gotten a bit of help from friends.
Making money on here isn't easy, but there's more traffic on this site day by day.