simple maths will tell you what to do 
https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Pyramid_scheme.svg/800px-Pyramid_scheme.svg.png
https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Pyramid_scheme.svg/800px-Pyramid_scheme.svg.png
They'll all collapse at some point, but the people who get in early wont care as long as they get out with profit.
Those, who really understand how MakeBTC works with level selling, know that this is not pyramid anymore.