Indie Games - How Much Does an Indy Developer Make?

I don't know how this translates to Indie RPG developers, but the developer of the indie game Cook, Serve, Delicious created an article showing what he made on developing a PC and iOS game and the problems he had with getting it to sell.

Right away I realized why games don’t get released on a Friday: if you don’t get any buzz by the end of Friday, you’re next shot is Monday. That’s two days that my game was going to be dead in the water, right after launch. How could I have been so dumb?

Actually, I remember why: because I felt like the people who were going to buy the game were the ones reading my blog since March, and the ones who really loved Ore no Ryomi and had played my previous fan games. I felt that was enough to push me to my $2k goal, a goal that while very short from the $8k I spent, would set me on track.

Well, by Sunday I had made about $250. I was panicking already. The audience that I thought was there was significantly smaller than I had imagined. Very few websites picked up on the game on Friday, leaving me with a dead weekend. I told myself that it would be OK with the Mac and iOS release I was going to work on, which I really felt was a more lucrative market, but it still marked the most depressing weekend I’ve ever had involving my indie game pursuits. I felt like a complete failure.