You may speak the language but if you’re not from around there, you don’t know what’s normal / cheap and are ripe for the picking, eh.
When I come across people who have learned French in a school that’s in an English er, wasteland(?) from a teacher who spent three weeks in Paris thirty years ago. When you ask them in French, “How are you?”, they reply “Comme ci, comme ça.” Sometimes I’ll tell them that no one in Canada uses that expression.
Even if the product is pretty much snake oil, Herbalife is a sketch multi-level marketing mechanism, not really a pyramid scheme – there is a real product there and the business, such as it is, doesn’t fundamentally depend on bringing in new people.
AFAICT, it’s in use in France, though the millennials have to be using some argot that’s incomprehensible to older folk - and must surely throw in some Arabic.