You do have to feel sort of sorry for the guy, but honestly, he's just not thinking creatively enough. I mean, ad impressions? Really? Here's my 4chan business model: two Paypal purchase buttons on the front page.
1. For $10, you can buy a voucher that lets you issue a single, one-day banning of any one user.
2. For $20, you can buy a "get out of jail free" voucher that allows you to nullify a banning.
I mean, the place is already the wild west--you might as well set up shop selling guns.