Just to show the example of revenue: I have invested 4ETH on the first week of preICO, and for 14 week I got roughly 0.065 ETH as a profit share what makes it 1.625% of the initial investment.
In the same period ETH gained almost 100% of value, but I hope BNK tokens will gain value too when it will be traded.
So you could get profit= 8ETH since you bought BNK ICO and probably a lot more if you hold your ETH untill BNK are out to the market. When the BNK is out the price will fall because everybody gets profit and you could buy even more BNKs if you wanted to. Just read the white paper guys...the numbers do not make any sense. Good luck to the project though. I hope that you are not scammers.