Like several others (ie Medium, YouTube Channels), LinkedIn has made a strong bet on quality, unique content with their Influencer product. Today, this email arrived which is about as influential as it gets: Bill Gates sharing insights from his influencer, Warren Buffett. It's Bill Gates' first post and he already has 25,000 followers.
And that raises the interesting balance between private and public content and personas. There is now a public persona for Gates (you can follow him) and a private relationship with Gates (the traditional LinkedIn model). We have seen this balance on Facebook: friends vs. followers and now private content with public hashtags: