Have you not read the too many stories of open source developers struggling to make ends meet ? Of the gpg guy saying he might give up because it's just too much ? Of all the devs on the edge of burnout because of all the stress and the demands of people not here for participating but only for their own service ? Of the very article we're talking about ?

I would love to live in a system where everyone is actually free to do whatever they want with their time, all day long, all year long, but that's not where we live today. What kind of people has enough time and energy to devote hours of their lives to something that is not their primary way of earning money ?

I too use only FLOSS, and only put out project under copyleft licenses, but that doesn't mean I'm blind to the structures in which we live in.