I think because of the airdrop there are much more people reached about the project. Hope there are not only airdrop catcher...
99% of the people joining all the airdrop are usually just interested in getting free cash, unfortunately. I don't believe are a very effective strategy.
Yes, but why are they only interested in quick money? Because many of all airdrop ICO's are shit.
If i come along a good idea i definitely look deeper into it and also invest a little.
For spreading the word its still a good tool imho.