Is the idea fresh or not, that’s the question?

Since it is not customary to cross-post in Habr, then I want to ask for advice. I got an idea here for creating a whole series of useful sites, and I posted this idea on StartupPoint (since it’s not a pity, and I’m not going to get ready to do all this 100% in the coming years and a half). But for some reason she was zinnusheny. And now I’m at a loss, is there really a “no-idea idea”? Indeed, in my opinion, the niche is also attractive and the model of commercialization is sane ... I want explanations, not monosyllabic answers and your minuses and pluses.