This is important, please make sure to check it!

iOS(iphone) users have been paying an unnecessary 30% fee until now. But they say it’s going away.

According to the explanation there, it says you need to update the Patreon app. I'm not sure if your existing payment will continue as is, or if you'll need to manually change your payment option

You need to update the Patreon app to the latest version for the new payment option to become available.
This change only applies to users in the United States and does not affect existing subscriptions.
If you don't update the app, you won't be able to access the new payment option.

You’ll need to update the Patreon app and manually change your payment option.