Has anyone ever been involved in a 'network marketing' money making scheme?

Question by Wicked Witch of Yorkshire: Has anyone ever been involved in a 'network marketing' money making scheme?
The one involving an upside down pyramid where you put in upto £3,000 and stand to make £24,000.
You start at the top of the pyramid and keep moving down depending on how many people you get to join.
Once you are at the bottom you go into 'receivership' and you get the £24,000 from other people that have joined.

I heard about this scheme at work today. One colleaugue joined

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