There is no way that Apple is not aware of the revenue analytics that would indicate these apps as financial outliers and not aware that these apps are scams.

Given the frequency with which we hear of legitimate apps being removed or rejected by Apple, one can't even argue that Apple is just not paying enough attention.

I don't say this often, but someone at Apple should be fired over this. This devalues the App Store in the long run, because it will teach Apple users not to trust their only source for apps; and that will lead them away from Apple products.