I don't really trust airdrop, in bounty campaigns you understand that you get tokens for the work done.
I studied the market and joined to German  project Vreo.io. They are doing dynamic in-game advertising and going to create marketplace for developers, gamers and advertisers. That's a huge new project in the gaming market.  Bounty Campaign:
https://bitcointalk.org/index.php?topic=2898738.msg29810876#msg29810876
Telegram grp https://t.me/vreoico