Support WBUR'The New Celebrity': The Rise Of Influencers — And How They Changed AdvertisingPlay30:50Download AudioSam SandersAnjuli SastryAlexander McCallSeptember 10, 2019 ShareBy most estimates, the influencer marketing industry is worth billions. But what does it take to be an influencer, and what happens when a person's livelihood is tied to a social media platform? (Getty Images)