There are some guys who made millions with crypto airdrops. Do not believe me? Here are some credible news sources covering these crypto airdrops hunters :
The time people were making millions from airdrop have passed, what we have now are worthless aairdrops and of you even get lucky to participate on one of them that made it to the market and have volume, the reward will be very small that you might even regret wasting time to do the little tasks involved such as joining their social media communities and engage their contents.
actually you are right, because that was once a method to promote cryptocurrency especially Bitcoin and as of that time many of the AirDrop survived but recently I don't think that there are people who make such kind of profit from air drop any longer, another thing is that we should not overlooked it because some people may be profiting on it right now but based on we don't have interest or so many persons does not have interest on it then may think that there is nothing on it, probably maybe people who is into it as I said may be having a profit while the are into it right till now