Used-clothing platform ThredUp sells everything from Old Navy tees to Gucci heels. It received roughly 100,000 items a day from would-be sellers in 2019 and processed its 100 millionth garment for the site. The company is trying to reach every generation and teach them how to thrift. They've set up special secondhand sections in nearly 40 JCPenneys and worked with Macy’s to create secondhand sections in 40 of its department stores. ThredUp even launched its own digital storefront on eBay to intice that site’s secondhand shoppers. “People in their twenties and thirties were born into [the sharing economy],” says James Reinhart, ThredUp’s founder and CEO to FastCompany. “For people in their forties and older, this consumption model requires training.”