There are no guarantees and promises! Neither explicit nor implicit.
There are no rules. In principle! The only rule is no rules. At all! Even if you follow all of the instructions, you still may "lose". "Win" might not be paid. Without any reasons or explanations.
And in general, you can lose all your money. Always remember about this and participate only with spare money. Or do not participate at all! Amen. :-))