I don't really understand projects like this on Kickstarter. It's a great concept - the demo looks awesome, etc. But it's a viable product. Why should I kicksta

I don't really understand projects like this on Kickstarter. It's a great concept - the demo looks awesome, etc. But it's a viable product. Why should I kickstart an app that will be a paid product after it's finished? I know folks use Kickstarter as a form of market validation, but I think the number of apps in this space already demonstrate that the market is valid.