Carrying out an airdrop before the ICO is one way to draw attention to the project. It seems to play a role in attracting investors. Also very important is the structure of the project itself, its idea, team, etc.
I agree with you. Aidrop before an ICO can draw attention to people about this project. so it can attract investors too..People will be aware that there is a new project on the way. they will become curious and search for your roadmap ang everything that they think it will help them see if the project is really worth investing for.