Google started sending out emails to all Google Analytics users to sign up for Adsense, the interesting thing is it came from Adsense but was addressed to me as an Google Analytics user.
The letter went on to show how adding Adsense to popular exit pages help one of their publisher's sites make more money:
A great example of using Analytics and AdSense can be seen in how SavetzPublishing.com, on its FreePrintable.net network, has monetized its top exit pages. SavetzPublishing was looking for a way to optimize their ad placement, without having a negative impact on their core users. SavetzPublishing used Analytics to identify their top exit pages and AdSense to display ads on these pages. Kevin Savetz, the owner of SavetzPublishing and FreePrintable, quickly realized that this advertising did not have a negative impact on his site's core users. Instead, as he describes, these ads provide "a means of monetizing traffic that would already be leaving. My users are still happy and getting relevant content."