A tweak to increase the likelihood of profit might be to go from, "build something that you wish someone would build for you", to "build something that you woul

A tweak to increase the likelihood of profit might be to go from, "build something that you wish someone would build for you", to "build something that you would pay someone to build for you." The "pay" filter might be good at killing unprofitable ideas. For example, Wozniak's idea meets the pay criteria. Facebook, Twitter, and most social apps don't. So they need more funding to bootstrap.