Ask HN: Rate my site "Would Be Better.com"

Some weeks ago I brought the site Would Be Better (www.wouldbebetter.com). It is meant as a place for users to post suggestion on how something (anything!) could be improved.

I have managed to generate some, but very little traffic, and the most painful realisation is that users might signup and post a suggestion or two but never come back.

Anyway, what do you guys think of the site? Is it an experiment worth pursuing? What would trigger you to keep coming back?

Thanks