"But keep in mind: not everyone is Google, not ever web site has a huge amount of traffic. With online ads, payment is usually tied to the click-through rate (CTR). The CTR is typically around 1% (actual percentage varies by web site). So if 100 people visit your web page, then 1 person will probably click on the ad, generating a fraction of a cent. If each click pays $0.001, then you need 1000 clicks to earn $1. And if 1% of uses click, then that's about 100,000 visitors."<p>I'm not sure where these numbers come from, but unless you are in fact running a spam site, and likely even then, revenue per click is going to be higher than a fraction of a cent. As a random data point, it looks like the combined revenue per click from Adsense on our sites is around 30 cents per click at the moment.