I know there are a few companies, like Mary Kay and Lia Sophia, who have a generally positive image, but there are many more, often built around some investment scheme, which continue to give this sector a bad image. If you scan the Internet, you will find dozens of negative articles, like "What's Wrong With Multi-Level Marketing?", but very few singing their praises.

The overwhelming majority of MLM participants (most sources estimated to be over 99.25% of all MLM distributors) participate at either an insignificant or nil net profit.[12] Indeed, the largest proportion of participants must operate at a net loss (after expenses are deducted) so that the few individuals in the uppermost level of the MLM pyramid can derive their significant earnings. Said earnings are then emphasized by the MLM company to all other participants to encourage their continued participation at a continuing financial loss.[13]
MLMs have been made illegal in some jurisdictions as a mere variation of the traditional pyramid scheme, including in mainland China.[10][11] In jurisdictions where MLMs have not been made illegal, many illegal pyramid schemes attempt to present themselves as MLM businesses.[7] Given that the overwhelming majority of MLM participants cannot realistically make a net profit, let alone a significant net profit, but instead overwhelmingly operate at net losses, some sources have defined all MLMs as a type of pyramid scheme, even if they have not been made illegal like traditional pyramid schemes through legislative statutes.[4][19][20]