I thought BitTorrent's main strength (although that is one) is that it allows dynamic routing through lots of nodes, so you aren't pulling from a central cache,

I thought BitTorrent's main strength (although that is one) is that it allows dynamic routing through lots of nodes, so you aren't pulling from a central cache, but from all sorts of clients. That was particularly useful in a world of asymmetric upload/download speeds; many people could upload to you at once, enabling your to saturate your downlink. That wouldn't be the case on the moon I would have thought, as you won't have a huge network of intermediate nodes to draw on. You probably just have one or two links, which you can push content through en masse. Tl;dr I don't see why what you're saying applies in this scenario.