There are a lot of Airdrops in cryptocurrencies and you might probably still see some that work the time and worth checking out, probably in the past months there was a huge number of this airdrop.
Mostly there were just some new projects that want their project to be a big trend and to do that they do a big airdrop to gain a lot of users and recognition in the cryptocurrency community so fair it kinda works since some of the top cryptocurrency today started with an airdrop I believe. These days I don't hear a lot of Airdrops but for sure there are still some, probably there are so many altcoins in the market so it's kinda hard to compete these days.
There are still a few about also that is still worth a try however I don't think it is still worth it since the chances are just so slim to get a good project and most of it, in my opinion, is not worth it anymore.