Her line of products were part of the "Walker System" of haircare, which she sold directly to Black women. According to estimates from Forbes, Eastman was worth $50 million in 1918, the equivalent of over $1 billion (£746m) in today's money. Run as a franchise business, it went international in 1970 and eventually became the largest pizza restaurant chain in the world. It went on to become a worldwide business. Amazon bought the business for $13.4 billion in 2017, the equivalent of over $17 billion (£12.7bn) in today's money.