It's not new, but you're wrong about personal data not factoring in. Companies will absolutely try to low ball you if you're unemployed, or offer you less if you volunteer your current salary, or offer you more if you're getting other offers.
This new stuff is a problem because they're going to end up colluding through software just like landlords and it should obviously be illegal but they'll get away with it until people catch on and the law catches up, or forever depending on location.
Sure, but it's only 6 years old, much newer than every one in this post, to my knowledge only has applications rather than libraries, and sources packages from the windows store or the community repository which is just manifests rather than the actual code or binaries.
In other words you're technically correct, but it's rather irrelevant