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?
Everyone must have a different opinion, for me personally even though the results of airdrop are very small but this is very helpful for paying transaction fees. But sometimes I do it just to spare my time. On the other hand, considering the task is very easy so I think it's not worth to miss them.