Seniority is a good thing in MLMs because when you're at the top of the pyramid, the people below you would work for you. It would be something like a passive income. But seniority alone is not enough. Those people at the top of the pyramid also worked hard to scam people and then got lucky with their couple of recruits. They only need a bunch of good recruits to earn passive income and let the money role in.

You can also create your own pyramid just like them even when you're at the bottom part of the pyramid. You just have to do the same thing that they did. Scam tons of people and hope that some are motivated enough to scam even more people.