The article isn’t exactly clear, but it seems like Apple is going to allow third party processing for in app purchases now alongside using the App Store payment system, which will be subject to the App Store fee plus whatever the third party processing fee is, but linking to an external website will not. Apple is requiring information about revenue generated from third party payment systems within the app to set the appropriate App Store fee. 12 or 27% now down from 15 and 30%.

They are also explicitly going to allow apps to link to external websites for payment processing, which won’t be subject to any App Store fee.