I'm developing an iPhone app with a subscription model, and I saw this ios paypal library: apple takes 30% of revenue of everything, but Paypal takes significantly less for micropayments (maxing out at 10%). Naturally, I became interested.
I guess what I'm confused about is this: if apple wants everyone to use the in-app purchase library for everything (as per this document), why does this paypal library even exist? Wouldn't any app that used it get rejected?
Has anyone successfully published an app in the app store that uses this library? If so, what was the purchase for? Digital goods? Physical goods? Content?