Even if that were accurate (which it isn’t really), there is no way Apple would be able to actually collect that commission. People can now link to their websites, patreons, Venmo links etc. this pushes the doors wide open.
The Judge here was speaking to the use of alternative in-app payment processors (which the parent article is wrong about) which apple would be entitled to cuts of. If people link out to the web no such agreement exists. Here is the actual text, see for yourself:
“The Court also notes that in the but-for world where developers could use an alternative processor, Apple would still be contractually entitled to its commission on any purchase made within apps distributed on the App Store”