There is probably not much margin in this camera. I think it is to get people hooked on DaVinci free for post and in the long run, when people do well enough financially, they will upgrade to the larger DaVinci system. In fact, you can only do 1080p in DaVinci free, I believe.
An exec for Adobe once stated that they were excited that Photoshop was the most pirated software in the world, because it got people hooked on their workflow. Then when they establish a business in need of legit software, they buy the full version. Like a crack dealer who gives you the first rock free :)