If you think about it, corporations are essentially crowd sourcing machines with sophisticated recruiting, hierarchies, regulations and rewards. One could say that corporations are on the far right of the spectrum while the contest itself with minimal rules, regulations and vetting for participants is at the far left.

Which is more efficient Corporations or crowd sourcing? Perhaps the sweet-spot is somewhere in the middle. Just add some rules and structure for vetting the players or distinguishing the saboteurs and maybe it might work!