Since I'm thinking of crowfunding, in general. It might make sense, as this has been abused to many times, if the crowdfunding companies had some sort of requirement or you pay back "X"% of the funds to donors if you fail. Something like setting a deadline for a certain launch or production start point or you have to reimburse 50% (for an example) of donated funds. Might curtail some of these campaigns that make big promises then just vanish when the money pays out.
I think it's like any purchase, do you research before investing. There are never any guarantees and you can always end up with a lemon.