U.S public direct selling companies are enjoying a profitable year through the first nine months of 2018. Four billion-dollar companies—Herbalife Nutrition (up 11%), Nu Skin (up 23.7%), Primerica (up 13%) and USANA (up 14.9%)—are on track to surpass net sales from 2017. The other billion-dollar US company, Tupperware, is experiencing lower than usual sales for […]