Main idea of platforms as tokensoft is to help to startups raise funds for development and became famous in crypto community (not to make you rich for free). Airdrop to holders will be not good desigion, because there is a very big chance that it will affect the price in negative way. I would preffer to give an options for projects: to give airdrop to soft holders, to give them allocation and\or lower price, do not do anything. At very end it depend from their policy, not from tokensoft desigion, and dont forget that local laws of some countries can restrict airdrops. If they will decide to give an airdrop it should be with linear vesting and/or soft tokens of holders should be locked, to prevent high volatility.