You are a stupid man. airdrop, works only to collect a lot of fake accounts, but it can not collect a users community.
You're wrong. On the one hand in airdrop most do come just to get free coins, and on the other hand I got and stayed in several projects just because of the fact that participated in airdrop.
You can participate in many airdrop for free coins, but you still leave promising (in your opinion) coins and wait for growth.