I disagree with your logic. You can find a good reason for anything. For example, Kickstarter chose to make funding a project an all-or-nothing deal (either you

I disagree with your logic. You can find a good reason for anything. For example, Kickstarter chose to make funding a project an all-or-nothing deal (either you raise all your funding or none of it). This creates a sense of urgency that has contributed to the popularity of Kickstarter -- more projects get funded because of this. Obviously someone who put $10K as their amount might still be able to do their project with less, but that defeats the effectiveness of the site as a whole. The same can be said for the time limit, though it's a smaller issue.