Free distribution of coins in the form of airdrops is not good for the project. They get a big community on Twitter, telegrams, facebook and other social networks, but this is a dead community, people want to get a few free tokens to be immediately sold on the stock exchange, they do not care about the project and what it wants to do. It is better to create a quality community!
That is true, but if done right, it can be used as a good growth hacking tactic.