By merely visiting this site you are already contributing to it, in a sense working here for free. Any non-destructive thing you do on this site is more work, again done for free.
Some people draw stuff (thanks draw anon), some pay for the site (thanks space_), some post news (tybna), some are very well read marxists and share their knowledge, some scan books, some make jokes, and some volunteer for the site's moderation. We are all working together to make this community work, whether we are aware of this or not. By putting in quality work, we attract more people who might be willing to also put in quality work. In this sense, the benefit we reap, besides belonging to a community, is the improvement of the content that we engage with, we reap the benefit because we are part of the community.
Your intense individualism and consumption of ideology has made you blind to the obvious. Don't repeat such nonsense ever again.