KYC is mandatory for every ICO, if anyone question this it means that it's not clear for you that SEC and other agencies are going after shady ICOs
for many ico its only mandatory above 2-3 ETH. For under 1000$ its bullshit imo. No state or government demands it.
They don't want to have any problems regarding the kyc. Maybe now governments don't ask for it but if something causes them to inspect biotron ico they may ask for it.
Better be safe than sorry.