Ask YC: How do maps monetize?

Fellow hackers, I work at an online map. The thought struck me yesterday like a train: all online maps are unprofitable! All the "advanced" ones, I mean: Google, Microsoft, Yahoo. Do you have any idea how expensive satellite photos are? When you roll out 10 terabytes over a weekend? This business isn't sustainable on its own.

What I'm saying, maybe we Google-Map-alikes shouldn't be so smug - we're plagued by the same monetization troubles as Facebook et al. It's all a swindle too. So should I change my occupation? Or make it profitable somehow? Throw in your thoughts!