As I know Pre-IEO has already started and investors can get 40% bonus. If investors participated in first Pre-Sale they got an additional 15%.
Investors that participated in Pre-Sale had bonuses in Pre-sale, in Pre-IEO they have more bonuses. There total discount is 55%. It is a realy big discount.
First investors always have the big bonuses to have more profit after the listing tokens on the exchanges will start. They will have more advantages.