I know three people who were/are involved with Amway...
The first was my husband's (my then-boyfriend) apartment-mate for his first year in grad school (grad dorm = you don't get to pick who you live with). He wasn't heavily involved, just doing it for a little extra cash. But, he bought all his food from Amway. That was all he ate, their preprocessed cr@p, no fresh meats, fruit, veggies... and he had rank B.O. You could smell him coming a mile away. My husband crashed at my place a lot that year
The other two people are a couple who are doing it full time. They tried to recruit us, and sent us the recruiting tape, which was all about how good it was to run your own business because you can set your own hours, put as much (or as little) effort into it as you want and reap the benefits accordingly, etc. The tape makes no direct mention of Amway. I just laughed through the whole thing because I'd recently started up my own business... the tape had some good points, but selling someone else's cr@p is not how I plan to make my millions!
When we told them we weren't interested, they didn't push the matter and risk our friendship, just thanked us for being open-minded enough to consider it.
Apparently Amway is offering a new option where you pay an annual fee and can get the salespeople's discount without actually having to sell to others or recruit others. Oy.