It seems that people might "make their million" playing the lottery too.
MLM schemes often seem like little more than a lottery.
At any rate you are free to spend your money in whatever way you wish, within the law.
But you might want to keep in mind that many MLMs over the years have been exposed as scams and at times prosecuted or shut down by federal regulators (for example Equinox).
The odds for a payoff may be better playing the slots in Vegas.
FYI-- No one has said that Herbalife is a "cult."
Note that this same disclaimer page is linked clearly at the database section about Herbalife.