Agree with you, airdrops and bounty campaigns make a lot of noise about project.
Yes, this is a very good advertisement for any project. And she proved herself very well. Market participants have already established ways to search for information about new fundraising projects and the release of new tokens. While advertising on social networks and services of bounty hunters, in my opinion, are the most effective.
Social media marketing campaigns have long since become mandatory for any startup or project. The first thing that you pay attention to when you get acquainted with the project is the activity of the team on social networks, the frequency of news about the project and much more.