So basically here’s what’s happening. We have several ad providers that at fill ads for you. One of the providers is sending out bad ads. This provider is the last in the chain that we use for fill rate. Once your app is live, the other ad providers will kick in and you should rarely get to this provider. But as a safety, to completely avoid this, we can remove that provider after you go live to avoid these ads at a slight risk you may not get fill, but in this case, no ad is better than a bad ad. While you are testing, these ads will be fine, so what the team suggested is that just before you go live contact ads@coronalabs.com and they will remove the offending provider as the enable the other good providers.
Rob