You have to remember that regardless of what kind of system you're using, the market will always find a way to put you in between a rock and a hard place. (babypips.com)
However later games have not proven to have the same kind of system - selling power. (gamesetwatch.com)
Instead, I think the important question is, what kind of system do we need to build so that innovation is part of the way it does business? (edutopia.org)