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?
I have experience of successful participation in various airdrops projects. Therefore, I do not agree with the statement that almost all airdrops are scammers. In my experience - I got a reward of about 70% of the projects.