Something to keep in mind whilst sharing your idea: Your idea may be great and may appeal to a science/tech community on HN, but be wary of building something

Something to keep in mind whilst sharing your idea: Your idea may be great and may appeal to a science/tech community on HN, but be wary of building something where the audience is very small (if you plan on commercializing it). Although quite a few of the ideas have some "mass appeal", some of them also seem so narrow that you'd be better off building them as OSS projects and releasing them into the wild (as they'd never achieve huge commercial success). Just for the sake of guidance, plan on what you will do with any ideas you follow through with (go commercial or open-source it).