[reitzensteinm]

Anecdotally, the Adsense revenue for my old startup also collapsed in late 2008/early 2009, from a peak of $1.00 cpm to $0.17 for exactly the same ad and roughly the same mix of traffic.

We went through a similar transition, although we started ours much earlier. If you make your page full of ads, you should be able to scrape together $1 cpm pretty easily, but sell extra content to a good game on that same page and it'll yield $10+ cpm - my latest game is a $50 cpm. That's a pretty serious difference!