Airdrops are all luck these days, and if it wasn't luck they would not be rewarding as they are. Zksync, layerzero could be having a token but due to super high speculation on those, even if they do have a retro airdrop, they will be having strict requirements.
Interacting with those protocols will require good amount of $ to be spent, and then again it doesn't guarantee anything. Best suggestion I can give is interact with dapps/protocols where you feel like doing so and leave rest.
Maybe some has been rewarding enough unknown to others because of the approach given to them since most of them now appears as a waste of time, only the beginners are now involved in all these kind of chase, cryptocurrencies has gone more beyond limiting the hunt on airdrops alone when there are other bounties with many opportunities if you could invest on them, they serve more than just what the investors could imagine.