You're incorrect -- this is an example of the rule, not an exception. Apple will not let Fandango (or anyone) sell a real-world item through IAP. That is why P

You're incorrect -- this is an example of the rule, not an exception. Apple will not let Fandango (or anyone) sell a real-world item through IAP. That is why PayPal is acceptable. It's clearly stated in the app guidelines that IAP must be for virtual / digital items only. I worked on an app that let you buy drinks at bars. In-app purchase was clearly out, so we integrated PayPal and Stripe. Apple allowed that and it's been in the store, with periodic updates and their reviews, for years.