OK, this has bugged me for a while now, so I'm finally getting around to posting about it.
I use the 300x250 ad size for many of my ad spots.
The channels for these ads show the right number of impressions, (several thousand impressions per day is close enough for this discussion).
But when I go to the "performance" page of the stats and click on "ad size" the 300x250 show almost NO impressions, usually less that 20 per day.
Any idea why that would be?
Anyone else see this kind of odd reporting?