Perhaps it's an aberration but the job I have now came to me through Linkedin and resulted in a 20% pay jump. I have been contacted by recruiters several times via Linkedin for potential jobs but currently have no interest in leaving. Granted, I am a data point of one, but success there may have more to do with skill sets and specific keywords that recruiters are looking for.

Except metadata for postal addresses are already available...NTY article on Postal Metadata collection

Which majority kept the DMCA after it was possible...

It's not about the who but the why.

"The very fact that one service could survive quite happily without the other, while the other would die immediately without the first, tells us everything we need to know about the merits and public service benefits of each."

Survive vs. growth are two different things. If we take Google News as an example - I will see a news headline and perhaps see wording that provides a differnt slant on a story. That is motivation for me to click on - and travel to - a news site that I would not otherwise have visited. With out this type of service, I would just be visiting one or two news sites for all of my news - and never know that "another side of the story" exists.