In a world where there are no (persistent) copies made by third-parties, the user still is in control of the visibility of their data by updating their profile directly on LinkedIn to show/hide pieces as they see fit. With a 3rd-party in the picture, updates to user-data may or may not be respected by the 3rd party, leading to poor user-experience.
Quoting the article, "HiQ Labs uses the LinkedIn data to build algorithms capable of predicting employee behaviors, such as when they might quit."
Based on that one statement alone, as an employee, I would be uncomfortable with the use of my data to supply my employer with my future plans before I choose to disclose it myself. That choice is mine, and mine alone; not something to be monetized simply because the option exists. And while I have no control over the sharing of data, should something like this happen to me, I'd be more inclined to stop using LinkedIn, which in-turn affects LinkedIn's ability to do business.