In a letter to developers sent out today, Google said that they will until September 30 to decide where they would like to move their ads. It’s encouraging them to migrate to AdMob Mediation, a competing tool that it launched after the acquisition while continuing to support AdWhirl. They can also continue to use AdWhirl, if they care to use the open source code “to run their own AdWhirl service.” But Google won’t be involved with hosting or supporting it.
Eric Leichtenschlag, an engineer with AdMob, notes that AdWhirl.com will also be shut down, so users will not be able to log into their accounts after September 30. For those apps that don’t migrate from the service, mediation will stop working. “This means we will return a 404 to the SDK and there will be a blank space where the ad used to be.”