Oh well I thought it was too good to be true :-/ I got propably 70% of my money out of it though.
Only 70% what happened to the rest ?
Lots of people made 50% profit. That profit came entirely from later investors.
If you get in early enough, you profit.
If you get in at the end, you lose.
Of course, the scheme could keep paying out for a while, in which case Eva could well end up making a profit after all (at the expense of the people who join even later).