iAd is working on test app, but not when its on appstore

Question

I've just made an app containing iAd in iOS 7.

It's working fine on the development state, testing on the phone.

But after it's been released at the appstore, no ad's are being showed.

I HAVE checked the code, and the iAd is enabled

Anyone know why ?

Answer 1

It takes up to 3 days for the ads to be displayed in a new app.