LinkedIn, the professional social network has pulled a fast one and secretly opted everyone in to allowing them to use your face and name in social advertising. You can opt out, though. Either navigate your way through the account settings until you reach Manage Social Advertising under Privacy Settings, or use this direct link (it assumes you’re signed into your account): https://www.linkedin.com/settings/social-advertising.
I totally understand their need to generate revenue, but this is a trick worthy of Facebook, not a professional network. It reminds me of the small print on the back of sporting and music event tickets that allows the organizers to use your name and image in their advertising in perpetuity.