My app has been on the app store starting September 1. Every day, I monitor the eCPM which has been around $10-$15.
Today, however, the eCPM shows to be $1.5. I am surprised that this was even possible with iAd. Considering that apple gets $10 per 1000 impressions, I assume the minimum number a developer makes is $6 per 1000 impressions (this is assuming the worst case without any click throughs).
So I thought that the minimum eCPM was about $6. Can someone please explain how it can be lower than that? (I read somewhere that there are bonus ads served for the advertisers sometimes, so they might not count towards the revenue, but I cannot imagine they will be so many so as to reduce the eCPM from $6 to $1.5).
Thanks!