Balnazzardi: If that's not gonna happen, then the only other choice I see for this project is to fund it in 2 parts, first to create as much as they can with 300 000 for example, provide great quality, playable demo and with card to play they hopefullly would get voted in Steam Greenlight (if it still would exists, I heard that Greenlight is going to be replaced with something else) and get to early-access campaing, where they could be more succesfull with that playable demo.
It's a sound plan, but I don't think many backers would support it. A few are willing to pledge just to do whatever they can to help, but most of us
need a reason to buy*. If the project creators are up front about what they're doing (which I strongly feel they need to be), most people will look at it and think, "They want me to pledge so that I can test a demo later? Yeah right. Next!" Of course, the project creators could just not tell backers that they are planning on only making a demo and then getting the rest of the funding somewhere else, but I would be greatly offended if I was deceived like that.
Even if a lot of people might be willing to fund a demo, they would not be happy about funding it while other people decided to just wait for the second funding effort.
*In Kickstarter, it's a reason to pledge instead, because everyone says it's not a store.