I'm still wondering why developers will organize airdrops and distribute an amount of tokens which is far lesser than the minimum amount of the tokens that can be deposited on an exchange for trading. If you don't want the users to cash out the money, why do you let them waste their time?
I think the purpose of airdrop is to fill their social media with crowd of peoples.
The more peoples join and supporting the project, the more investors will be attracted to investing.
Airdrop participants can hold their token for better value in the future if they cannot deposit it due low value.