Very late post but I wanted to chip in here. Not all MLMs are bad. There are some that are legit businesses and are great opportunities. But there are many illegal businesses (such as pyramid schemes) that mask themselves as MLMs. Also, lots of individuals tarnish the reputation of the industry by conning people out of their money and selling a false dream. The same can be said about ICOs and crypto. If I give someone bad crypto adivce and make them buy high and sell low, they will hate me and all cryptos. If I introduce someone to an ICO and it turns out to be a shitcoin where the creators run with the money, the person who took my advice will hate me and think all ICOs are scams. The same is with MLMs. Not all are bad, but there are a few scam ones. It all comes down to the research you do. Always do your research!