Google AdSense Ads Now Useless

Maybe it's me. Maybe it's this site. Maybe it's because this site is about advertising and the readers are hip to the click....so they don't. When Google AdSense text ads were added to this site, it turned out to be a very profitable venture. That was 6-8 months ago. Over the past several months, AdSense has gone from a profitable venture to one that now brings in less that pennies per day.

I know Google has messed with how they compensate websites though AdSense but this is ridiculous. While traffic to this site has grown exponentially upward, income from AdSense has gone exponentially downward to the point where the text ads are just a useless waste of space. Are there any Kevin Lee-like search engine marketing experts out there that can shed some light on this?