Earlier quoted context omitted.
Very good list. I would add that most open source projects have many people working on them. So suppose you actually manage get paid despite all that -- how do you distribute money fairly? This is a huge problem can could actually slow the project down by leading to hurt feelings. Ironically, it's almost better for the group if nobody gets paid. Corporations have evolved all sorts of imperfect systems to solve this p…
it's almost better for the group if nobody gets paid. Relatedly: Studies show that paying people zero money and giving them respect gets better results than paying some pittance well below market rate. The study conclusion was to the effect of "Pay enough (market rates) or pay nothing. Don't pay some pittance because it is all your project can afford."
When it was a freeware product, several people wanted to donate but we never accepted any donation, just to avoid the feeling of getting paid too low. Also I guess we were a bit equalitarian: we wanted that either nobody paid or that everybody paid.