You are really into something here I think. Combine it with something like this: https://news.ycombinator.com/item?id=20861911 https://news.ycombinator.com/ite

You are really into something here I think. Combine it with something like this: https://news.ycombinator.com/item?id=20861911 https://news.ycombinator.com/item?id=20861911 and I think one would be at a decent starting point. > [...] > If it costs something people would be more careful. > The cost can be anything: > - Classify 5 answers correctly > - Pick answers from a multiple choice > - Pay a dollar > - Wait a few days to activate > - etc > Ideally the user should be able to choose a method that suits them but make the account worth something. > [...]