The fact that these herbalife clubs cannot be sustained ultimately seems to prove Ackerman's point. Just google around for Herbalife shops in Queens today, it doesn't seem like any of them have survived.
It depends on whether there is equilibrium. If someone founds a club and breaks even for a while while losing weight until they meet their goal, then someone new does the time, the cycle can perpetuate until the rate of newly overweight people drops.
