@tominko - well, whole situation is not a usual shop experience and you are not the first who perceive it that way. You are supporting a start-up (or a small company) who are promising you to !develop! a great product and ship it to you when its done. So getting this product into your hands is just a small part of the process you are involved with. And you didnt buy the product, you supported a process with a product as a result. So even talking about such thing as "money back" .. is unreasonable. If project goes bad - your money is gone. And mine. And all of ours. Like an investment. Just in this case, you get an actual product, not shares.
You dont go to a company you invested in and say - look guys, you didnt get me my return on investment i expected, actually there is a minus, so get me my money back.