I'm sorry but I don't think you are quite grasping how the art industry works.
1. Why should anyone post work on your site if they could recieve negative votes?
2. Who is going to pay to post jobs when so many places are clammering to post them for free?
The answer to both those questions is probably the same. If you had a huge following then you might get some employers willing to pay for getting their job featured, but not many. So far I don't see that you're offering anything to the professional artists. They are your target market. Find a way to appeal to them and everyone else will come running.
I said in your last thread, what artists need is someway to coordinate all of their social media updates from a single non-confusing/spamming location.
Think linkedin, twitter, blogs, facebook, tumblr... et al. Be a professional interface that saves time and hassel and people will use it.