No, this is only 2018 current condition. If I compare with last year (2017) there are many legit airdrops. Like BLUE, ELTCOIN, EREAL, BITWHITE, REBL, and many more. So, I can say 2018 is the worst time for airdrop. I think the last Airdrop which gives good token was POLYMATH.
Totally agree with blogardianz! There aren't more the old airdrops. If you think there was an airdrop of Decred (reached 120$ per token)...now all the airdrops are worth nothing just because you will lose money thanks fees if you want to exchange tokens for eth.