The focus of Go's open source project is making a language that works well for the kind of networked software Google and many other companies write, roughly "cloud software". I am not sure what ecosystem that would skew toward Google revenue: maybe cloud providers, but Go works just as well on Amazon and Azure and Heroku as it does on Google's products. I am not sure what "hiring models" means, but I've literally never thought about anything related to the hiring process while working on Go.

For more about Go and open source, see my opening gophercon keynote, at blog.golang.org/open-source.