> Apple will ban you for this.

How? I thought it was a Patreon thing - the "competing platform" would be competing with the Patreon app.

I'm not familiar with Patreon, but I thought the way it worked was that you could tip content creators via the Patreon app. I'm pretty certain that Apple cannot tell Patreon (a third party) that they are only allowed to offer exclusive content.

Apple doesn’t allow you to mention that you have alternate payment channels on other platforms. Can’t even allude to it.

To me this is the thing that should be outlawed. Let people pay the Apple tax if they want, but don’t prevent people from making other arrangements. Most people are lazy and will pay the tax, if it isn’t excessive.