I’ve been invited by two people to join MLM businesses. I tried to explain to the first one that she was involved in a legal pyramid scheme, but once you’re sucked in, it’s like you’re brainwashed. When the second person came along, I didn’t even bother trying to talk him out of it. I wrote a post about MLMs back in June and came to the same conclusions that you did.
Amway stresses that the main difference between a legitimate MLM business model and a pyramid scheme is that a legitimate MLM is focused on selling products, not recruiting more salespeople. In a legitimate MLM, it should be possible to make money by simply selling products directly to customers. With that main criterion in mind, here are some other ways to identify product-based pyramid schemes: