I think a more apt analogy has advertising as Facebook's fossil-fuel burning, but then I expect severely curtailing fossil-fuel use will severely reduce GDP, which I am guessing is not a common belief around here. (I'm guessing that many around here think that it is essentially just the stubbornness of those in power that keeps fossil-fuel use high, and that even if we force the whole world economy to transition to 100% renewals over, e.g., the next 5 years, things will turn out fine.)