No
I'm simply stating I can understand why some would feel its a "scam" but by using the true definition of the word scam - Amway does not meet the criteria. Is it silly and a waste of time, yes! but a scam No.
If people think that it isn't a great opportunity or there's better ways to make money, that's perfectly fine.
However, don't label things that are perfectly legal as a scam, nor act like the industry can generate billions of dollars without success stories.
People should just say they don't think it's a good business, calling it a scam is slander and factually incorrect.