Apps have to deliberately provide space for iAds, and Apple certainly knows the identity of an app that is asking for ads. So the argument here must be that the

Apps have to deliberately provide space for iAds, and Apple certainly knows the identity of an app that is asking for ads. So the argument here must be that the presence of "mature content" anywhere on the platform discourages ads. But Safari can access vast amounts of "mature content". So I don't quite get it.