Airdrop Booms again when market is making great high like 2017 and this year as well.
But are you really making Money from airdrops? or you are just relying in Hearsays? because it is the experiences that talks here, many comments are bases in their own experience in joining airdrop over the years, there are even others that never even gain for long.
I only take advantage of certain moments and Airdrops every year, not chasing them all because I also don't really like Airdrops basically, so I only take advantage of moments on Airdrops that are hype or trending.