This kind of idea is actually a great use case vor virtual currencies and a market, because the given AND received value can come from a human. I once wanted to build something similar for project feedback only, but the core idea is the same.

A potential problem I see with simple question/answer systems like this is, are questions about truth. Paying to get more answers only forms a majority opinion, not truth. Collaboratively working on an argument graph could be useful in this situation.

Did you do anything to prevent sybil attacks in your voting system?

Btw, Show HN is meant for projects you can already try, not just for waiting lists.

I still signed up and want to see how it works :)