What does Debian do?
In fact there's been quite a bit of vitriol about Canonical (company behind Ubuntu) profiting (for what that's worth) from all the hard work from Debian volunteers and not sharing as much of that value back to Debian as was felt was deserved.
* I do realise that different release timings can fudge with the timing, but when fedora is building upstream versions and I hear it, its a bit.. disheartening.
I think this usually doesn't really have to do with Canonical at all, but with third party developers only testing against and building for Ubuntu.