Our content is not GPLed. We’re retaining all rights to the art and music, because we want complete control over where it can and can’t be sold. People have suggested a CC-Non-Commercial license for the content, but we’re not interested. That would expose us to the very real danger of someone releasing the game for free on a platform we’re trying to sell it on. Whether likely to happen or not, if it did happen, it would have a catastrophic effect on sales, so it’s too much of a risk for us.