There are screenshots about how this feature works in the linked article. I would super OK with this. It gives an option to use Apple Pay or their internal pay

There are screenshots about how this feature works in the linked article. I would super OK with this. It gives an option to use Apple Pay or their internal pay system, and it shows how much each costs so you can make an informed decision. If you value Apple Pay's security and privacy features enough, you can pay the higher price and use that option. If you don't, you can choose to use the publisher's payment option and pay a lower price. The problem with Apple Pay is a) it is forced as the only option, and b) it is hidden from the user; you may never realize that all these years you have been paying for a service on your iPhone, you could have instead gone to the publisher's website and saved a lot of money.