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?
This is the strategy to promote their tokens and the reason they give lesser tokens is to prevent from dumping when it listed on an exchange for the first time. but it's not totally waste of time for the participants because they can hold their tokens.