Many of us participate in the airdrops because we want some free tokens without doing hard way, so they join with the project and expect to get much of amount.
That is the reason, devs of those airdrop based campaign also not bothering about the future of their project along with not taking any consideration of airdrop participants' importance. Yes, airdrop is meant for free tokens without any big hard work but at the same time, many airdrops are being conducted with minimum requirements like joining telegram channels and fulfilling few other social media based tasks.
Airdrops are another way of scam in recent times. Yes, I may sound a little bit harsh but that is the reality. Because, I am also not finding any good rewards from airdrops I have participated. Just full of waste of time.