There is a paradox with app stores in that they play the gatekeeper and can arbitrarily not allow certain apps, remove them, or enforce certain rules on what types of apps are allowed, but then also permit all sorts of shenanigans such as this.

The developers of these types of apps are just pushing the envelope of what's allowed until they're called out and formal complaints are made to the app store gatekeepers.

The malicious & overly expensive apps should get taken down swiftly, but are allowed to linger for months on end, generating large profits.

Whilst app stores are policed, there exists a lot of room for exploitative apps. I imagine these app store gatekeepers are trying to keep a balance, but app stores seem heavily swayed in favor of scams, and malicious or overly expensive apps.