A freely-released product would be very expensive for the developer. The crowdfunding would have to cover all of the development costs, since the project would have no further direct revenue. There's probably a clever way to fund a free-to-play or DLC-supported platform that way, but that only makes sense for a subset of games.
Whoa, what? You've just described every single Kickstarter. Sounds like you have a problem with Kickstarter, not this campaign.
Isn't WeFunder your target?
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.