"hey i have 5 ultimate frisbee frisbees with super mario bros. art on it. want one? $25 bucks to my paypal" example taken from noah kagan explaining the proces

"hey i have 5 ultimate frisbee frisbees with super mario bros. art on it. want one? $25 bucks to my paypal" example taken from noah kagan explaining the process. if you manage to collect the cash, you order the frisbees from the vendor you found. if you dont sell 5, just ship the money back. the example is deliberately simple but you can apply that to anythign. you have a business idea, sell the result of the business. if nobody wants it, dont build it. i dont know go fund me, but if you run a kickstarter, its basically the same thing. you say you need an amount of X dollars to be able to deliver. if its not met, just return the money. the fact that people on kickstarter are idiots and dont deliver after collecting money is another story.