> there should be some feedback loop to detect scams quickly before they climb the App Store charts.

Well, that's the thing, isn't it? The app store (any app store) which has a review process and takes a great cut of revenue, should stand for quality and safety. Here, that's clearly not the case.

For another example, see Amazon problems with fake products.

Both Apple and Amazon are large enough and have so much money that you'd think they could spend some of those resources on handling the problem. Perhaps they do, but appears not.