A few people do make big money from MLMs. And these people are often trotted out in promotional videos, celebrated at annual events, and very publicly ‘rewarded’ with prizes like prestigious cars (although these ‘prizes’ aren’t as generous as they first appear – you simply get a discount on the lease which you must take out in your own name, and if your sales fall, the discount ends…). You also need to promote the company on the car they ‘give’ you.
Because of the nature of recruitment and the dream of living the life of riches, it is no stretch to the imagination that sometimes, the real picture gets blurred between the lines. Also, MLM is notoriously known for getting you on the bad books of friends and family. This is of course a general stereotype against the industry and not a concrete consequence.