In general patreon would effectively be providing and services outside the app (even if that service is ‘a warm and fuzzy feeling’). More so if you actually provide some reward via your patreon.
> Apps in this section cannot, either within the app or through communications sent to points of contact obtained from account registration within the app (like email or text), encourage users to use a purchasing method other than in-app purchase.
There's a good point to make that Patreon's donation tiers mean patrons can be rewarded for their donations. I would hope that the digital equivalent of a tip jar is a different category since it's not a purchase.
It technically is, but Patreon takes a percentage so it wouldn't be treated as a p2p money transfer app:
> (vii) Apps may enable individual users to give a monetary gift to another individual without using in-app purchase, provided that (a) the gift is a completely optional choice by the giver, and (b) 100% of the funds go to the receiver of the gift. However, a gift that is connected to or associated at any point in time with receiving digital content or services must use in-app purchase.
