> And Apple suffers since they allowed the app to be sold on their store.

Well, they could allow the app to be sold outside their store, and then they wouldn't face any reputational risk from it.

I don't really see how this is deceptive either - if the app clearly states that you're paying for it upfront, and what the price is, then how are you being deceived? If you aren't willing to pay for it without trying it, then you can just not use it.