Free games aren't as crazy an idea as one might think, the same way open-source projects like Blender are able to make quite a bit of money. If any of you are fans of space simulator games, I'd check out Kitten Space Agency by RocketWerkz. Their intention is to make this game not only free but DRM-free, so that users can legally put it on a thumb drive and share it with each other. You can also play it entirely offline. Because it's an educational game that's a spiritual successor to a beloved Kerbal Space Program with a significant cult following, they are hoping to continue the project via donations and by partnering with educational institutions. We'll see if this works out for them, seems a little ambitious, but I really hope they set a precedent.