Freeloaders, like large corporations taking open source and then not giving back, is yet another symptom of a system that rewards extraction and self interest.
FOSS exists despite capitalism. The fact that people are willing to work on something out of their own passion, or sense of community, directly contradicts the fundamental assertion of capitalism.
Humans are not inherently greedy.
My dad got me a Linux laptop as a kid (I was 10 I think?), and I am so grateful that he did.
To be fair, I already had a huge passion for computing, and it meant that I would constantly toy around with Linux, breaking things and learning how to fix them.
I have been a Linux user ever since, and I feel have learnt so much about computing because of it.
(I started on Ubuntu 12.04, with the glorious Unity desktop)