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?
I guess those bounty hunters who participates on an airdrops are those who is considered loyal. They cannot manage to create more accounts and they do not cheat, most likely, they will just going to spend their time on airdrops.