In an attempt to figure out why tenured professors with book royalties still have sidebar ads on their blogs, I placed a few ads on this humble site, which you may have noticed.
Total earnings accrued come to $0.00. Nil, if you don't like numbers. Hrmm.
That's through 169 page impressions. Let's be generous and say that $0.00 is really $0.049999..., which implies that a site that gets, say, 1000 times more hits than I do (e.g. 100,000 a week or so), would be making $5 every week.
Clearly, either I'm missing something, or the marginal cost of these ads is pretty low. I will keep you updated on the first cent I make and if I have any relevations on the issue.