Khloé Kardashian is famous enough that when I type her name, autocorrect fills in the accent mark above her “e.” She has 300 million Instagram followers, just 40 million shy of the entire US population. Her smallest movements on social media can become national news stories.
But commanding an audience bigger than many nations is no guarantee that those followers will turn into customers, especially in the fickle and crowded beauty industry. Even megastars like Rihanna and Taylor Swift…

