They are all first party and combined represent ~0% of the advertising market share compared to Meta and Google.

Apple is irrelevant and until one of those channels gets billions of users looking at it every day it will remain irrelevant.

of all the brands, apple cult brand is the strongest, it's hard to argue when it's already spelled out word per word in their leak internal memos that their intention to stop tracking was because they wanted a cut of FB's ad revenue.

Their execution under the guise of caring for user privacy is a master class though, it's impeccably done, there should be a case study done about this.