The bigger issue is Ubuntu isn't a product. It's a nice community layer with some high level project management spearheading the direction and a team of core developers adding nifty features. If there is paying for the product then how is that money distributed to Jack John Johnson the guy doing patch fixes on his free time because he enjoys it. Does he get a salary? Some kind of financial bonus? Then you've got the…
I'm also curious about why you take as a given that money needs to be distributed to "Jack John Johnson"? There's certainly nothing in the licenses that forces it, and when Apple takes BSD software and sells it nobody thinks that's out of line. When RedHat charges for RHEL nobody complains either, even though most of the software is open source as well. What line is Ubuntu crossing here?