Some might say, "because the downliner is a money-making machine for the upliner, and the upliner is the pathway to money for the downliner." That is a fact, but the complete answer to the above questions is not so simple.
有人會說，「因為下線是上線的『生財工具』；因為下線要從上線那裡求取『賺錢之道』！」話是沒錯，但答案並不這麼簡單。