I strongly disagree here, airdrops do not build communities anymore. There are too many people who consider farming airdrops as a job, but that is very bad. You can look at any project that has a good airdrop to confirm my statement. As soon as the airdrop farming is over and distribution has been done, the activity in their telegram and discord drops dramatically. This means that in most cases airdrops are not effective at building a community, instead they only attract farmers who are stealing money and moving away.