Exactly what Twitter, Microsoft and Amazon do too.
> as Google said in a blog post on its new service for marketers, it has partnered with “third parties” that give them access to 70 percent of all credit and debit card purchases.
https://www.technologyreview.com/2017/05/25/242717/google-no...
This is a for-profit company. It will always do what is more profitable, even if they don't do it right away.
However the fundamental difference is that their model is being an hardware company.
Remember what their advertising clients disliked about Apple's ad platform compared to the likes of Facebook and Google?
> A new report on Advertising Age has revealed what advertisers think of Apple's arrogance when it comes to its mobile advertising platform and its tight grip on user data.
"One person familiar with the situation exec said Apple's refusal to share data makes it the best-looking girl at the party, forced to wear a bag over her head," the AdAge report read.
https://www.techtimes.com/articles/3568/20140222/apple-cares...
All of these companies deserve their due scrutiny. Specifically around the illusion of privacy though, nobody has further to fall than Apple.