There are also tons of diverse activitys - like ghospel singing, rocks'n roll, accidents, motivational whippings. One can even be promoted to one of the upper rows.
Its fantastic.
As a student, and someone who wants to become a strong engineer over the next ten years... this kind of opportunity is fantastic. You can see it as "uncompensated labor", I see it as a way to learn, get my code "out there", and get better at my trade.
Open Source never really cared so much about its contribooters as they cared about open source. If stallmann would start worrying about its contribooters beeing able to live decent lifes with familys, without having a boss breathing down there neck- maybee then.
But it guess that is just not that sort of freedom thats high on the priortiy list. Open Source as a lifestyle is currently limited to students and beginners.