It isn't open-source yet (and might never be). But it also might, as I said in a sibling comment, I've been thinking about a license that would require only running it (and derived software) on green energy; that way, if competition were to arise, cheaper/dirtier energy wouldn't be what we would be competing on. But figuring out whether that's plausible, and what the consequences of the decision would be, is hard.
(In general the idea of a license that's viral like GPL, but oriented towards green and renewable energy, seems like an interesting thought to me.)
(In general the idea of a license that's viral like GPL, but oriented towards green and renewable energy, seems like an interesting thought to me.)