For something to be maintained long term, it must generate sustenance, this is usually in the form of cash payment (energy transfer).
People should be paid where they have created value for others, commensurate with the effort applied.
Discussion
FOSS is basically volunteer work. Even many long-running and popular projects never earned a sat.
Most people won't pay for things that are free. Because they're free. They're seen as presents.
And even if you have some sort of mid-term financing plan or financing promises, you still have to do a lot of work up-front, to have enough to show potential investors, customers, and patrons.
That makes it like a business, where you invest time, effort, and money into it, without knowing if it will ever generate enough returns to cover your costs.
I'm saying that many wannabe FOSS developers won't do this work for even a couple of days or weeks, at a time. Or they just want to do the fun part over a long weekend (hack a messy prototype together), but when it gets serious, they disappear.
You can't even get them to check a board or show some sign of life, once a week. Not even a DM saying, "Busy now, be back end of March." Nothing. They work, when they wanna, and when they don't wanna, they just act like you don't exist.
Or they'll ask a question and get five detailed responses from multiple people within a day, and just never look at the responses. Or they'll say they'll deliver something in a week and just never come back. Then other people end up doing the work, and the increment is delayed.
You can't include these people in a team. They literally slow down development.
It's not lack of talent, it's lack of character.