We'll start the ball rolling then...
A common scam is a Pyramid scheme. They are illegal,
‘get-rich-quick’ schemes that cost victims to lose money.
Promoters at the top of the pyramid make their money by having
people join the scheme. Then they pocket the fees and other
payments made by those who join under them. In a typical
pyramid scheme, a member pays to join. and convince other people to
join up and to part with their money as well.
In contrast, people in legitimate multi-level marketing earn
money by selling genuine products to consumers, not from the
recruiting process. Be aware though, some pyramid scheme promoters
disguise their true purpose by introducing products that are
overpriced, of poor quality, or of little value. Making money out
of recruitment is still their main aim.
For the scheme to work so that everyone can make a profit there
would have to be an endless supply of new members. In reality, the
number of people willing to join the scheme (and therefore, the
amount of money coming into the scheme) dries up very quickly. When
the pyramid collapses (and they all do) relationships, friendships
and even marriages can be destroyed over money lost in the
scam.
Singapore has had its fair share of pyramid schemes.
Sunshine Empire was one nasty one that conned its victims in
Singapore and Malaysia hundreds of millions of dollars. Don't
take our word for it. Google and find out.