Is apple still blocking apps from telling users they can subscribe outside of the app store?

I.e A message on check out that says "You can save 30% if you subscribe directly the website. Apple charges a 30% processing fee for using Apple subscriptions, please just subscribe on the website."

patreon app store.

So if I read that correctly, Apple wants a cut from Patreon's iOS app, not all Patreon creetors that have iOS apps. People still have the option of contributing to Patreon directly via their website, or even their mobile website.