@agramonte
I think I know what they mean now. At first I thought it was the apps that Kidoz were promoting that was the problem. It isn’t.
The problem is that Apple does not allow you to promote other apps than your own. This means that, according to Apple, offer walls like the FeedView (and maybe even the panelView) technically are not allowed according to Apple’s App Review Guidelines section 2.25.
2.25: Apps that display Apps other than your own for purchase or promotion in a manner similar to or confusing with the App Store will be rejected
Apple App Store Review Guidelines:
https://developer.apple.com/app-store/review/guidelines/2016-06-13/