Good for her, she really does deserve it. it is a LOT harder to build a manufacturing company and make a Billion, then a software as a service company and make the same amount. Her ability to scale and leverage her idea has made all the difference.
Smart lady! Lots of companies out there selling you stuff to make you thin - she's selling you stuff to make you LOOK thin. A lot easier than doing the diet! No wonder she's a billionaire. You go girl!