Using Ad Network Optimization, developers can change the prioritization of ad networks (including AdMob itself) in AdMob Mediation stack, based on eCPM which AdMob scrapes from nend's reporting API.
To access the API, you need an Report API Key in addition to API Key and Spot ID.
Here is the instruction how to acquire the Report API Key.
In addition, nend has updated their mediation adopter and now developers can mediate nend and AdMob in an interstitial (full screen) ad unit.
Original article: Inside AdSense Blog (JP), Press Release by Fan Communications (nend)
