100K is the salary for one developer at a large game company in North America. There are tons of us indies around the world running a lot leaner, so to speak.
Well ok, so two developers at half that, that's still 100K. I guess outside of North America/Europe/Japan/South Korea salaries are cheaper, but in most of the market, 50K is low. And most projects have at least 2 people, don't they?