Some kind of PR here.
You join their social network: twitter, FB, telegram, reddit, discord and all. Then you have to retweet, tweet about their airdrop with hashtag,...like that. Don't forget the refferal program. And you know what, most of the token is not for airdrop, it's like 10-15% of the supply, the person join almost their bounty will get like 40% of it. Then ICO happened. If their token was list on market, and you will want to buy more the token. Then you hold on to the token, wait for it making some miracle.
That's what i see