Although i never follow airdrop, perhaps i can suggest this services :
https://bountyhive.io/I often find that websites hanging around (recommended by other members) in this forum.
Please always do due diligence first before you decide to use their services.
As far as I know, Bountyhive is a place to get some bounties project.
Honestly, I never got any airdrop project from there. Maybe is it new?