the airdrop for me its super profitable to gained money, even its all free but you need also to support them, what i mean is if you buy some token or coin for better,. i know they dont yet if they success the project i just suggest its get to support them, even its small money you spend in that project but soon your spend money to his project your profit make 3x income.
Majority of airdrop is not worth to support because majority of them are a pump and dump coin. It is not worth the time and money to support it. Better support the coin that has a good and solid project. It maybe free but sooner or later if you invest on those crap you will find yourself loosing your investment.