I didn't read much of the article, because to me at least it's fairly obvious why advertisers who have a large financial motivation for tracking, and no disincentive for tracking users who don't wish to be tracked; will track.
As far as I understand the implementation is a lot like RFC 3514[0], which was published as an April 1st joke.
[0]: https://www.ietf.org/rfc/rfc3514.txt