A true airdrop will only require you to do the task one time only.
Seems like you missed the bounties hype way back 2017. Back in the days, they airdrop some tokens where you need to share on your timeline when they post something on their social media page. The amount you will received depends on how much active you are from liking, commenting, and sharing their posts. Anyone can join it as long as they have their own social media account unlike bounties where for me, it is only exclusive for members on this forum. If you don't have an account during those times and the rank is not qualified then you won't be able to participate from it.
Actually he's right, airdrop and bounties are different, if the airdrop on 2017 they're asking to like, comment and share their posts. The project is wrong since they're confuse between airdrop and bounty, they're conducting a bounty program but call it as airdrop.
Airdrop only need to send our address to participate, now there's almost no airdrop at all since they're don't want to distribute their coins freely without any effort.