I think it's a good idea but I just can't see it being feasible. Where would you get enough BTC from in order to pay people for every post they make. If the website became popular, that would not be likely.

Also, I don't mean to be rude, but I highly doubt there will be anyone that is willing to give you BTC in order to develop the site when you are a very low rank and have no way of proving that you won't just take their BTC and never be seen again. I'm not saying that is your intention but it is likely that people won't be willing to give you BTC for such reasons.

I think it would be great if you could make a success of the site by the way, Bitcointalk can be a little intimidating for people that are new to cryptocurrency and an alternative site with less emphasis on the technical side of things would be great. Good luck with your project.