Lots of people don't get to work on cool stuff at work, but they get paid and work in a convenient place for their life situation.

A lot of people have energy to give to open source because they get something out of it that's not money. Most people who play sports are not paid, or do art, dance, blog or lots of things really.

If you don't want to work for free, don't, I'm sure someone else who's bored or wants to sharpen their skills will step and fill the void you left.