2 points
To clarify, you can sell GPL licensed programs but any GPL licensed software us inherently worth 0$, because the first person that buys it is now able to give it away for free.
2 points
2 points
1 point
Donation, patronage, gift economy, mutual aid, or whatever you want to call it is fine by me. People can pirate a lot of proprietary software as well, yet people still pay.