Women in these middle-class homes began earning an income in order to be able to purchase more of these convenience goods. Some did this through the means of finding a more traditional job, but many also turned to multi-level marketing businesses such as Tupperware to supplement their husband's income.[19] Tupperware encouraged women to sell as many Tupperware products as possible, so as the brand increased in popularity, the number of plastic goods in American homes did too.[20] Outside of direct sales, it contributed to consumption because the women who sold through Tupperware had the incentive that they would receive household appliances once they reached the sales goal set by the company.[19]