It doesn't work without a token (apparently it did some time ago http://blog.makensi.es/post/3679713636/fingerprinting-your-visitors-using-social-networks http:

It doesn't work without a token (apparently it did some time ago http://blog.makensi.es/post/3679713636/fingerprinting-your-visitors-using-social-networks http://blog.makensi.es/post/3679713636/fingerprinting-your-v... ) You can get a token from Linkedin itself.