The time to complete an airdrop is very short. I don't think this is a waste of time because some airdrops still allow us to get a small amount of revenue. On the contrary, some bounty tasks that will take weeks or months to complete will eventually disappear. This is the most time-wasting thing!
So true man. When someone doing a job for months to get something in return and at the end there's nothing and the project disappears, that's Hella frustrating.