Homebrew wants to avoid being filled up with random stuff that nobody uses.
So to get something into homebrew repos you have to show somehow that people use it.
I guess GitHub star count is one way of doing that. Even though it’s probably pretty easy to game it.
For open source software that is cross platform you could probably get it into another package manager first, and then use that to argue for getting into Homebrew. But since this tool is macOS specific it would not get added to any Linux or BSD package manager repos.
I hate that that's a metric.