Wow so just linking from the app to the internet where something is for sale is not allowed without a cut? If I use the app know as Chrome on iOS and I click on

Wow so just linking from the app to the internet where something is for sale is not allowed without a cut? If I use the app know as Chrome on iOS and I click on a link to a page on amazon.com where I purchase a chair, by that logic does Apple also want a 30% cut on the price of the chair?