I had no idea about community promotion ads. I just clicked on one and was somewhat puzzled. I went back and hovered over the ad, and discovered that it had "comments" and "stats" links. I then clicked on the "stats" link which gave me a vague idea about what I was looking at, but no real explanation.
Could the "stats" page please link to something like Community Promotion Ads - 2013 or -- even better -- some sort of general explanation of the concept of community promotion ads?
And / or perhaps the hover links could include an "about" link which would take me directly to the (hereby postulated) FAQ for this topic?