Actually... everything in this world is MLM.
You work for someone is also MLM (Your boss is the upliner, you are the downliner). Later promotion, also MLM since you will have downliners (your subordinates).
People selling Streamyx also considered MLM. Agent 1 sell Package 1 to Agent 2 who later engage part timers to do the job.
So, MLM makes money? Yes, if done properly. No, if too greedy.
Same goes for contractors. Interior Design firms will hire them, they (contractors) will hire specialists for the job, the specialists will hire people will suitable skill and etc...