She wrote it because she was ideologically committed to the idea that it did happen.
And in so doing she set back her own cause by a decade.
There are plenty of abuses at multi-level marketing schemes. I have seen a few.
So Bill Ackman picks on what is probably the straightest MLM and bluntly makes up stories. In the first presentation Shane Dinneen (Ackman's staff member) got up and said that there may not be a single legitimate consumer of Herbalife products anywhere on the planet.
I promise you they are really easy to find. Daily consumers.
He did this after months of "research" which can only be like Sabrina Rubin Erderly's research - research to get your pre-determined opinion confirmed. Easily falsified research.
At some stage the anti-MLM campaigners will need to distance themselves from Bill Ackman's false research.
Sooner is better.