Anyone can make a B2C reader app, but those reader-apps must have built-in self-service sign-up, including accepting payment through Apple. There is no way around that unless you offer a free tier and never prompt your users to upgrade or tell them that they can upgrade through their web-browser. Logically this extends to free-trials-without-payment-details because when the free trial ends what are you supposed to display in the app?

Netflix, Kindle and others are exempted from the self-service sign-up requirement because Apple knows they can’t win a PR fight against them. Spotify has self-service sign-up in the app, but that’s because they’ve always had a free tier, where’s there’s no free/gratis membership tier for Netflix or Kindle.

If you try it yourself right now Apple will require you to have a self-service signup flow in your app, which is only viable if you have a free tier - otherwise you’ll have to pay the 30% rent or let your iOS users use your service for free indefinitely because you can’t put up a “your free trial has ended” message.