As of our new version of Adveryday, now every new ads will have their expiration dates (from 2 to 12 mths).
The old ads will also be assigned with an expiration date. But how do we decide when is the expiration date for them?
We calculated these expiration date through the creation date of ads. The oldest existing ad will have an expiration date of 6 months, start from 3 Apr 2012. While the newest existing ad will have an expiration date of 18 months start from 3 Apr 2012. The existing ads that in between will be populated proportionally between the oldest and the newest existing ads accordingly.
So much for the explanation :)



