Airdrops are everywhere in this forum. Have a look in the altcoins section.
You need to learn what an airdrop is.
An airdrop can only come from a hard fork...where you are granted coins (for no effort on your part) equal to the number of coins you have on the blockchain that is being forked.
What people most confuse airdrops with are ICOs or compensation. ICOs are the initial offering of coins from a new blockchain (literally, initial coin offering). A lot of people that advertise for new coins get an allotment of those coins as payment for having done the advertising. This is called income...not an airdrop.
Yes that's not an airdrop of course and for me its like an online job which can give you sustainable income that will be used for the basic, and minor expenses for yourself or for family if you are married. Airdrop for me its like a reward given after the participation of the coin give away in order for the currency to be listed on the trading site like an ethereum contract etherdelta, which has a good trading records in term of daily trades.