I'm done with LinkedIn.
I've been on the fence about it for a year now. I get more recruiter spam than value.
I'm also a bit too old for the schadenfreude that accompanies news of my overpaid friends getting canned. I'm running my own race these days and I've never been happier since I stopped comparing my lot in life to the few lucky SOBs I know that survived the cull of sub-prime.
I think a better strategy is (1) your own domain and/or (2) a site on github with actual code to validate* your talents.
*I hate those "Joe Schmo supported you skill in [insert banal technical skill here]" messages. I once put down C++ because I had been working with it for a couple years. Then, I thought better (I would not take a C++ programming job. Period. Hate that language.) and took it off. Next thing I know, I've got coworkers supporting my C++ acumen and LinkedIn trying to push it back on my profile. Ugh. I call that invasive feature creep.
On top of that, they seem to leave the backdoor open a bit too much for a company with $20b market cap.