I am always interested with a money making app. Well I am already familiar with your lini like Coinbase, Uber and Airbnb. When me and my officemate want have a staycation out of town we've search some place in airbnb. But the applications are quite different from what I have expected. I am seeing like watching ads that will pay if certain number of ads were watched, gambling games like dice, etc but I have no luck with it so it does not become useful to me at all.