Obvisouly for the free tokens, but other than that, what else incentivise you taking the time to do the airdrops? Most of the time, I found that the airdrops often give little to no return. I just started to get into the crypto thingy. I feel like it is better off finding those ICO projects and considering investing in rather than chasing like 5 dollars?
5 dollars may be small for you but not for some other especially for those who live in developing country. That's why there's still lot of people who participate in airdrops. Moreover, it's free, no need to invest. I used to be an airdrop hunter back in late 2017 to early 2018 but not anymore as it's rare to get such decent reward today. My biggest gain from an airdrop was btw ($200).