My wife did Mary Kay and they had a clause regarding buy back: They would pay 90% of what you paid to buy it and you'd be blacklisted - you could never by a MK consultant again.
So even if an MLM has that type of program they probably make sure people know it'd be bad for them to exercise it.
> they probably make sure people know it'd be bad for them to exercise it.
The example you cite seems to undermine this claim. If you're doing terribly selling Mary Kay products, you get 90% of your money back and... you can't sell Mary Kay products anymore. Which you couldn't do in the first place; why would you care about being blacklisted?
So even if an MLM has that type of program they probably make sure people know it'd be bad for them to exercise it.