Linkedin is paying because of The penalty giving by the court.
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If you are linkedin user,then you know that linkedin sends many spam e-mail to their user's ,which cause their inbox full with the spam e-mails.One of the linkedin user put FIR against linkedin. Court give order to linkedin to pay 1 Cror 30 lac $ to their user's.
If you are user of linkedin since september 2011 to October 2014 .You also get 10$ from the website.