Same here. And I had the exact same reaction. a.) Good, I have been gone long enough for them to take notice. b.) How sad is the state of current engagement. You have to resort to sending me emails about my 2 friends "Joe commented on Sara's wall" click here to see what he said. How sad. You could provide utility, instead, you choose to pimp me out for a click.

From a marketers standpoint its an easy sell. We increased users CTR and time on site, wahoo! From a business standpoint, there is a slow churn and dissatisfaction which erodes the value created until the user has a negative viewpoint and distrust of the service.