All of the people who demand things from the maintainers are. Very few of them are willing to sponsor or pay consulting fees. If you give up they complain loudly, and then often pay a contractor to do the work they wanted.
If they paid $1 each, you would not hand thousands let alone millions of users.
You could though, if the mindset of open source software consumers were to shift to 'pay for things you get value from'. Even if it was $1000 and only companies that paid, the landscape would shift dramatically.