You've already been compensated with massive amounts of free, open source technology that you use every day, probably every time you interact with your computer. Now you have an opportunity to do a little work for it.
EDIT: harlanji's response, below, is the much better one IMHO. I let the parent frame it as a question of compensation. As harlanji points out, that was the wrong question.
EDIT: harlanji's response, below, is the much better one IMHO. I let the parent frame it as a question of compensation. As harlanji points out, that was the wrong question.