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?
Lets not forget that reason they do it for their own benefit and not the participators. Why would they care if participants get only cents from the tasks they ask them to do? Participants should think, calculate how much they could get and the time and effort they need to give and its up to them if it is worth it then let them be if not let them not. Airdrop is promotion.