Tks @rockatansky !
I think one possible solution would be to calculate the value of this airdropped TRIBE and discount of $1. This is what I have done here:
It seems that redeeming Genesis Participants by around $ 0.9 per FEI would be fair and more simple than requiring ppl to buy TRIBE.
I think we should use the ETH price from Genesis. We are not redeeming ETH, but FEI. Investors wanted to be exposed to a stablecoin, not ETH when they invested. I consider that in the above calculation.
I also made calculations about the impact for Fei Protocol If we have a 60% of FEI being redeemed:
Source: Impact Evaluation