Look in a mirror and bite into a lemon, and you'll probably see a more pleasant facial expression than you would when someone tells you about this great network marketing opportunity they just heard about.
Network marketing, or multi-level marketing, gets a bad rap just about everywhere. Basically, some product or service is offered (it runs the gamut from makeup to cooking supplies to nutrition supplements to telecommunications and beyond) and you sign up to offer or sell this product/service. It's common to pay money upfront for training or supplies.
You also are taught to recruit people to do the same thing, and you get a cut of their action whenever they make a sale. The more people you bring in, the more money you make. These are commonly known as pyramid schemes because if you draw it on a board (you with three people branching out under you, and people branching out under them, and so on), it looks like a pyramid.
Many people buy into the idea because they think that once they get their network built up, they can just sit back and watch the money roll in. Maybe work a few hours a week and spend the rest living like royalty. Not the case.
As Dave says, what you are is a full-time recruiter and trainer. There's nothing illegal or unethical about the business, but you have to be a good salesperson to convince others to buy into it and stick with it. That's the challenge, and that's where it usually falls apart. Not only is it a chore to get people in, but there is a high burnout rate, so replacing them is common.
On top of that–and you can probably see this one coming–people tend to avoid you when they see you because they think a pitch is on the way. You can lose friends if you are too ambitious about your "opportunity." We are right around the corner from Thanksgiving, so a big family get-together can become awkward if someone starts bragging about their big money-making scheme.
You can't work three hours a week and bring home six figures. That doesn't happen. Elvis Presley can lie around all day and make big money, but we can't. Don't look at a network marketing scheme as a ticket to easy money. If you choose to try it, be ready to work.