Let me answer your question.

For early investor or adopter you are qualified for

15% ETH cashback from exclusive private sale
12% ETH cashback from private sale
10% ETH cashback from pre-ico
8% ETH cashback from ico

also you can earn bonuses and cashback from affiliates program

5% ETH cashback from 1st level of your affiliates for every cashback.

8% bonus for level 1 affiliate
6% bonus for level 2 affiliate
4% bonus for level 3 affiliate


Hope this will lead you to trust and purchased ERN.