One of the reasons that Apple does a bit of due diligence during the onboarding of a developer and establishing a developer agreement is to ensure they can reliably take legal action against developers that abuse the system.
The possibility of being banned from the Apple App Store ecosystem and/or legal reprisals is one way to deter unwanted behavior that can't be blocked through technical means.
The possibility of being banned from the Apple App Store ecosystem and/or legal reprisals is one way to deter unwanted behavior that can't be blocked through technical means.