Hi. I will post later a thread on what's are airdrop but the first I had test was about SuchApp.
You can win some cryptomoney by join this link :
You need a myetherwallet and a bitcointalk account.
After dat you will be ranked in fonction of what you do. Follow them on twitter or anything else or just by sign in.. and at the end you will win a little part of money.
Have a nice day