Hi. I have sumbitted an app with iAd, it is ready for sale now, I downloaded and installed it but I see a banner with Test Ad. No real ad.
Have you contacted apple? I would think there's much to do with them than your end.
I think it's bacause of insufficient ads for UK, I see that US users click on this ad. For UK users it's just blank.
If you are still seeing test ad then you are running the version installed on your iPhone from Titanium (not through appstore).
Try removing from your iPhone and installing from the appstore directly again.
UK iAds has really picked up this week. I am getting 5 or 6 ads rotating in my app and revenues are shooting up.