Cyanogen, the commercial version of the OS is not open source, like at all I think. And I bet that if Cyanogen becomes much more successful, within 5 years they'll completely give up on officially supporting the open source version for other phones, too. They'll just see it as an extra cost that gives them little benefit (in comparison to their success then) and as harming of their "exclusivity" for certain phones. So they'll kill it. Cyanogen seems like a very self-interested company to me, and is willing to backstab anyone as long as it puts them at a higher level in the market.