Lame_Wolf - 1:51 pm on Dec 29, 2010 (gmt 0)
Bill made excellent suggestions in a previous post: The email was for market research or customer engagement. Could be data collection for research because of the tracking codes and single pixel image that phones home to let Google know the email was opened.
According to the ASA... These emails are being sent out by our team to help publishers better anticipate their payments. The idea is to cut down on payments-related issues by helping publishers plan in advance.