I'm thinking about making a website with a useful free service that pretty much operates itself. Hopefully it will turn out to be somewhat addictive, but of course there's no way to tell. Bascially I want to know if banner ads will be able to at the very least pay the hosting bills (how many hits do you need to make, say, $10?), and where I can find a company that will pay me to show banner ads. Clearly a lot of people have profited from offering free services on the internet, but just have many must have ended up with a lot of time down the drain. Any thoughts?