The title of this thread is bit provocative, but the fact is that most people have a bad experience with airdrops. According to several airdrop hunters I spoke to, the majority ICOs don't pay out at all.
What's your experience with airdrops? Did you get scammed most of the times?
This is not true! in fact there are still many airdrops that are not scam and proven to have good selling points on the market. maybe you have not been lucky.