This article is solely about Apple making it harder for 3rd party apps and websites to track you. That's certainly a good thing, but the downside is that it just makes the data Apple has (or can have) far more valuable, which only increases the likelihood that they're collecting and selling a lot of data.
This article is just one guy speculating about his thoughts, and he was possibly paid to do it by Apple. If Apple wants to make privacy a selling point for their products, they would no doubt seize the opportunity to do so very loudly. And, if it's not Apple saying it, then it's not legally binding.