First of all i dont agree, just look at people who invested like half year ago before dump, or year ago, they received x100 and its even without procent in system, so just join early and its ok to participate in get-rich-quick scams.
I've read it before, some are making profit by joining early and don't come back again. They will find new again and will do the same process but I still don't like it and I will never ever join, even once in such scheme.