The faculty member believe this was a Ponzi-type scheme because it states that there is Higher Rate of Return if one has a higher return on investment and that it is about 44 % and even more in 12 days, if one invest.
A Ponzi scheme is known to be a form of an investment fraud that is said to pay their existing investors using funds obtained from other new investors.
Note that in the passage, It tells that a person could invest $6 to $6,000 and gets about 44 percent return in 12 days an this made the faculty member believe that it was a Ponzi-type scheme
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