I would say that it's recommended to have a warning page. It's also a nice place for more ads.
You really just need more content. In order to keep a surfer at your site you need to have a better content to ads ratio. At the moment, there are a lot of ads and paysite links, but very little content.
Let me ask you a question, since there is something related that I'm thinking about right now. If someone was to produce a free script completely intended for the easy maintenance of a hub, what would you want it be able to do? I was thinking that being able to add galleries and free sites would be a given. Also, would you want galleries and free sites to list together or in separate columns/pages? And what else do you think would be good for a hub script?