To me, this is the most easily agreeable part of what the EU has been after. It is unfair that Apple restricts Netflix from telling it's users that they can sign up and pay for Netlifx on their own website. It's unfair that Netflix can't even tell its users the rules that Apple enforces on them.
It's telling that Gruber is pretty staunchly against EU/DMA interferance in Apple, and broadly thinks they're wrong. But this is the one thing he agrees on
> If Apple wants to insist on a cut of in-app purchased subscription revenue, that’s their prerogative. What gets me, though, are the rules that prevent apps that eschew in-app purchases from telling users in plain language how to actually pay. Not only is Netflix not allowed to link to their website, they can’t even tell the user they need to go to netflix.com to sign up
https://daringfireball.net/2019/01/netflix_itunes_billing
https://daringfireball.net/2020/07/parsing_cooks_opening_sta...
(I think Apple now has their 'reader app' carveout for apps like Netflix, but it's still pretty obtuse and inconsistent)