Since you were lucky enough to be part of the YC program, I would suggest going back to them and seeking some advice. I'm sure they've faced similar situations (Kiko comes to mind).

If you are getting sustained demand for likebetter though (albeit small right now), that might be a pretty good indicator that you've built something people need. You'll never know if the idea is viable or not unless you run with it for a while. With your connections I definitely would not give up on it though.