You could easily label this the decade of the influencer, those YouTube and Instagram stars who make money by selling FaceTuned versions of themselves while hawking face creams, fashion collaborations, protein powder and how-to-improve-your-life seminars. Daniel Boorstin wrote a famous person is ‘known for his well-knowness,’ and that was Paris Hilton,” says Duffy, author of 2017’s “ Getting Paid to …