So you drive away your biggest draw? In the media-centric view of the world, those people would be asking for a cut of revenues. There's clearly a major disconnect from reality on one side or the other here. Any examples of successful businesses that do it the way you describe?
Billboards work because it's captive traffic. Very few if any sites on the net have captive traffic. Twitter certainly doesn't even in the current model and I think the model you're describing would be even harder to manage in terms of spam and abuse, not to mention coordinating with law enforcement. So likely even less captive.
