Crowdfunding is great. It gives aspiring inventors and entrepreneurs a chance to see their products come to life with the help of the public who believe in their ventures. But we often only hear about the projects that make it while the ones that fail either go back to the drawing board or fade into obscurity. So why do some crowdfunding projects, despite possibly having bright ideas, fail to hit that goal? We cover five of the biggest reasons on this week’s Five For Fortune.