Good question. I don't have a good ad stats program right now, and I charge a flat rate for banner ads on my site, so the honest answer is...I haven't checked!

My ad service provider is going out of business on 12/31, so over the next few weeks I'll pick a different ad software program and/or ad service provider, and I'll then be able to track stats better.

Interesting question. I read her post, checked out the blog, disabled Adblock but still didn't see any ads. So I disabled Ghostery as well and finally saw the source of her income. My initial thought was "who the hell clicks these ads?". I suppose the target group isn't people like me who use extensions Adblock and Ghostery. And people like me are (and probably most of you) - at least for now - a pretty small group among web users.