Not at all. There have been numerous campaigns that released their product to the community upon reaching their goal, like Cards Against Humanity, The Pirate Bay - AFK documentary, the Open Goldberg Variations, and many more projects.
Notice that none of those are video games. It's great that lots of creative work is being licensed under CC BY-NC-SA, or even CC BY in a few cases. But most of those have something else they can sell later, like a physical book or cards, or are otherwise able to completely fund the entire process from the pledges. So they were able to open-source the product, have a free version, and still make enough to survive. That's not quite the same thing as completely releasing an entire game for free, although they may appear similar at first glance.
Not at all. There have been numerous campaigns that released their product to the community upon reaching their goal, like Cards Against Humanity, The Pirate Bay - AFK documentary, the Open Goldberg Variations, and many more projects.
http://www.kickstarter.com/pages/creativecommons