Hello everyone, I’m Carmine from the Chartboost Support Team.
Unfortunately, it appears that recent changes to our system have impacted ad serving for iOS games when using our Corona plugin. As Ingmar and Naomi have reported above, this doesn’t appear to affect projects integrated through XCode and our native iOS SDK (which Enterprise users have the option of using), nor are Android projects which integrate our plugin seeing these issues. We are still successfully serving ads in those cases.
Today we identified the root cause of this problem and are now working on a fix. We know that while this situation continues your games are being affected, so please stay tuned to this thread: we will post an update here as soon as we can report a solution.
~Carmine