Specifically it isn't necessarily about advertisers it regards surveillance.
Advertising revenue can be completely offset by Governmental tracking.
As I said in the other post we can't prove the positive but it certainly is a feasible option.
I know I could do it given the charter.
In early 2011, the minimum buy price on the platform was $500K. By midyear, $300K. By early 2012, $100K. Early 2013? $50 (no K missing, just fifty bucks).
On the other hand I'd refer you to Bletchley Park.
Turing et al knew the decrypted Enigma messages but the Government were unable to act.
For good reason.
Secrecy is a thing
I do think it's important to note that I have not seen direct evidence of them abusing that data, but we've seen plenty of companies/governments/organizations doing bad things for years without direct evidence.
As for zero-knowlege encryption, iCloud Keychain is although the rest isn’t, you’re right there. Hopefully they’ll move in that direction.
But that's irrelevant to the point. The point is that Apple prevents users from understanding or controlling how the user's data is being used. Just because we understand why they won't fix it doesn't make it any less true that they could fix it, but choose not to.
And that's what I mean by "putting their money where their mouth is". They talk a big talk about protecting their users, but their actions are different than their speech.