I have not been able to earn a single penny from airdrop this year. I have participated in so many of them in the past months but non is profitable uptill now.
Well I can't speak for previous years but the 2024 is looking to be pretty generous for airdrops.
Numerous tapping apps on Telegram are clearly the hype. But I personally am not that impressed by rewards of 100-200 dollars. So I leave these tapping games to schoolboys and prefer something more serious.
I believe most of reputable airdrops are often done via Galxe or Zealy. So checking these sites could really help you out in your search.
For examply, myself I'm now taking an active part in the Prom Testnet campaign which runs via Zealy. If you ever participated in at least one Zealy questline, you can probably guess what the tasks are: writing articles on Medium, posting threads on twitter, etc. There are at least a dozen such quests running on Zealy right now, so why did I choose this one? Frankly i really like the reward. It wont be a simple airdrop that we usually expect. The winners will be awarded a role of a validator, the upper layer of community governance who will be receiving 2% share of the total network fees for their efforts. For me this is a huge reward to look forward to, and is much better than a couple of token from a usual airdrop.