I think it would be difficult to come up with a good metric. For example, it should not be based on some easily faked number governed by a foreign company.
Lol, they have been on sale online since forever, because investors apparently can be conned into thinking they have some value.
A better solution would be to require a written proposal which gets reviewed by someone who assesses against some criteria such as project age and other factors. Don’t make it too hard, but make it enough to stop the scheming individuals who think they’re going to start their own GitHub repo, set Claude Code loose in it once a week, and call it civil service.