I think you mean "innovators". Even though 9/10 times they claim ownership on things they've contracted out on their parent's cash.
Whereas with LinkedIn, we are willing to give up much more sensitive and accurate profile data, such as all of our past employers, addresses, phone, email, birthdate, professional experience, headshot, school information, coworkers, etc.
The initial content of a typical LinkedIn profile is much more rich than a starter FB profile. There is no need-to-know for Facebook to have as much "real" information about you as LinkedIn has. I feel that LinkedIn got in through the backdoor with the information most people have provided to it. Though Facebook undoubtedly has more of your day-to-day activities than LinkedIn, which might be more dangerous.
I never personally got suckered into a Facebook profile, one of those (lucky) few that have continued to live on planet earth without a FB account. But LinkedIn is another story, I totally got swooped up in that one for sure.
Combine all this with the fact that there are so many FB users and many of them are children who wouldn't otherwise have a LinkedIn account (and are more comfortable with sharing personal info online).
So, while I agree that LinkedIn is in the group of data collectors, I don't think they're quite on the scale of FB.