Earlier quoted context omitted.
If you don't want open source developers to starve, you damn well put your money where your mouth is. High quality open source software is worth paying for. The times when open source software is a niche cottage industry powered by volunteers are long gone. Time is not free, and software does not grow on trees (despite what overprivileged lisp users may claim).
I think lisp users are more for code growing from lists, not trees
But I think that why only God can make a tree.
For God wrote in Lisp code when he filled the leaves with green.
The fractal flowers and recursive roots:
Also in SICP, trees are all made in lisp.