Apple store acceptance, submitting an app which users other services for profit

Question

Apple says,

11.2 Apps utilizing a system other than the In App Purchase API (IAP) to purchase content, functionality, or services in an app will be rejected.

Answer 1

If you sell guides in the app you probably have to use in app purchases, where apple will remain 30% of the money. otherwise your app will probably get rejected.

if you have an developer account you can check the app store review guidelines.. point 11.2:

11.2 Apps utilizing a system other than the In App Purchase API (IAP) to purchase content, functionality, or services in an app will be rejected

11.13 Apps that link to external mechanisms for purchases or subscriptions to be used in the app, such as a “buy" button that goes to a web site to purchase a digital book, will be rejected