Except if you pay them for a support contract. So there is a way, and it's actually a pretty obvious way.

I wonder if the likes of Red Hat, SuSE and Canonical have a support contract as they are commercial redistributors.

	▲	inigyou 6 hours ago \| parent [-]
		Probably not. Why pay someone who's willing to work for free? When he stops working for free, then you pay him. Open source is not exempt from economic principles.