if you want to get instant airdrop , well self claim airdrop is what your looking for but it needs small amount of eth in your balance for the gas.There are self claim airdrop that only 0eth is the set amount so send and 1 gwie, thats about $0.04 maybe.  

Only few  valuable airdrops are around, and it depends on the terms of the company of  the distribution date, usually after their ICO or months after their ICO.