75,000 dollars, BTW, is far from the limit of their financial ambitions here. At http://pledgespacecommand.com/
they're soliciting contributions of up to a quarter of a million dollars.
Frankly, the "rewards" they're offering when they get to that hypothetical level of contribution are pretty weak tea. A teeshirt or a prop is a nice "thank you" for a few hundred, but for hundreds of thousands any sane person is going to want a piece of the action.