Ok, thank you. I understand this. But why everything is so complicated? Why we need this Aurora tokens, if they useless? We cant sell this tokens on your (and other) exhanges?
AURA tokens are not useless. When Snowglobe is out AURA tokens will be used to stake the network (via proof of stake mining) and get trade fees from IDEX and fees from the Boreal banking. If anything AURA has the best long term potential.
DVIP = Membership with free trades on IDEX until 2020
AURA = Staking token of Snowglobe/Aurora network, in return for staking you get IDEX trade fees and fees from Boreal banking
Boreal = Price-stable cryptocurrency that is backed by a combination of ether reserves, debt from loans and acceptance at retailers (such as IDEX) at target value regardless of the market price. For example if Boreals were trading at 80 cents you could buy them up and get $1.05 worth of trade fees paid for on IDEX.
IDEX will trade DVIP, AURA and Boreals. Boreals will be a base currency option like USD is for ETH/USD and BTC/USD, except it will be ETH/BRL