Most MLMs are now required to post this information on their websites.
Based on their own internal numbers the percentages aren’t too far off.
The biggest beef I have is that those who make the most money do so because the people under them are selling and recruiting. It’s a recruit-to-win game. Not a sell lots of products to win game. Look at doterra. In order to make the higher levels you need to recruit more people. You can’t advance without recruitment. Regardless of sales numbers.