I think this has already been said, but there are just too many contributors. I just checked how many shows/comics were featured on the right side, I counted 16. I don't know if this is the popular opinion, but I only watch 2-3 a week. That's not even mentioning those who are not featured, such as that First Person Marketer guy.
I'm not saying any of these shows are bad, but the Escapist shouldn't be using them if they can't afford them.
Here's an idea, switch some of your shows to blip tv. The person making the video will receive the money for their videos through blip, and the Escapist will receive money from the advertisements on the page.
As for more advertisements, I don't think they can use more advertising. Assuming they use Google for their ads, there's a limited amount of ads you can place on a web page. They can't just put 30 ads on a page and receive revenue for all of that.