In 2013, Tupperware left the Direct Selling Association.
In the words of its' CEO: "We didn't leave direct selling," Tupperware chief executive officer Rick Goings told The Wall Street Journal last year. "Direct selling left us, because the industry became dominated by buying clubs and what looked like pyramid schemes."
Tupperware subsequently released a white paper entitled: DIFFERENTIATING TRADITIONAL DIRECT SELLERS FROM NETWORK MARKETERS. reproduced here: