Actually, you'd be surprised on the banners too. They've gotten better. We've been seeing regular 50 cents eCPM from just 1 banner, and if we tried hard, we could probably work in another one or two without seriously degrading the user experience.
That adds up fast, since the platform makes it not too hard to get to hundreds of thousands (or even millions) of pageviews a day. 1m page views per day at 50 cents eCPM is still $182k per year. Not a bad second income stream.
