MLM is just a commission structure for direct sales companies, but unfortunately some have abused it. It is not a "get rich quick" scheme as a lot of people tout. May Kay is a respected company, but they have a multi-level commission. Many do, but the stigma of MLM persists because of the truly crappy companies and the wild claims of many distributors.
It might save energy to let people play games and chat more on computers. If they are not doing that they may want to go the mall, beach, drive around, and do other things that take much more energy.
Agreed