On the other hand, considering that the surface of the moon has already been visited by space probes carrying instruments and by manned spacecraft, while many billions of possible combinations of human beings having conversations here on earth have never happened, there is probably a lot more undiscovered return on investment to be had from investing in WhatsApp than from investing in the Google Lunar XPRIZE. Both are arguably good things to spend money on, but investment flows sometimes attempt to follow where the big returns are likely to be.