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?
The motive of every project to give airdrop to cryptocians are to be known and to get investors to participate to their funding like ICO or IEO but not all airdrop is good and give you a good earnings. So make sure that if you really want to join a bounty that project is good and give good value.