The time of profitalbe airdrops are over long time ago. Last year you got some ethereum tokens airdroped which you could sold to a very good price. These coins are now all worthless. Back then it was a real airdrop hype, and everybody who could made an airdrop, and with the hype thy could make a goo amount of money. But none of them had a real project behind. So valuable airdrops with value are very rare!