Reader apps are an extremely specific clause, mostly related to their Ebook price fixing lawsuit. Zero of the apps in discussion here are reader apps.
I should also note, that up until recently, Apple specifically had clauses that you couldn't have the link to the website bit AND they had a 'you can't pass the price onto customers' rule.
Reader apps is quite wide category. It includes pretty much all types of content - ebooks, videos, audio etc. Spotify and Netflix falls under it afaik.
I have no idea what world you think you live in..but Apple has pretty clearly defined it mostly as Email and Ebook reading. Zero music or video services have ever gotten an exception. Spotify and Netflix have different exceptions called 'backroom deals' that allow them to have an unfair advantage over smaller players.
I should also note, that up until recently, Apple specifically had clauses that you couldn't have the link to the website bit AND they had a 'you can't pass the price onto customers' rule.