The way I imagined it, the maintainers wouldn't be considering a commit whose author was not willing to bet on its success.

This thought experiment took part in a world where the web was significantly worse than our own: hoards of malicious AI's and precious few humans trying to not be mistaken for a malicious AI. Of course a pre-existing trust relationship is much better, but ideally there'd be a way for untrusted authors to make it through to a real human somehow. Attaching money to the commit would be one way to do that.