I was about to post about LinkedIn too. I am convinced it uses, among others, reverse view lookups. I have had suggestions for people I know whose LinkedIn prof

I was about to post about LinkedIn too. I am convinced it uses, among others, reverse view lookups. I have had suggestions for people I know whose LinkedIn profile I had never viewed or searched for myself; the only explanation is they had looked for me. I don't know if it's because I interact with it more frequently and using real personal info but its "people you may know" predictions are eerily more accurate than FB, or anything else for that matter.