If there would be a legit and sure way to get big airdrops, everyone would be using it and after a while that technique would be rendered ineffective as value is based on scarcity and you can't just gift everyone something and expect it to have value.
This is precisely what has happened. In start, retrospective airdrops were rewarding substantial amounts, as this trend got saturated and people started farming for potential ones, qualification requirements have gone high while reward got severely less.
This is also the reason I don't expect much from layerzero, zksync but I'm curious how they gonna turn out.
probably gonna be turning out the same like any other retroactive airdrop that got too saturated, in 19 may 2023 alone zksync have reached more than 1.5 million unique address.
if all those are qualified and are active retroactive participants then you could roughly guess whats gonna be the reward, definitely not a lot could be allocated to each addresses due to the overflow of the
participants themselves.
therefore don't have high expectation for these retroactive, because too many people are trying to be rich out of it meanwhile I don't think it will have any substantial amount of rewards seeking from the statistics themselves.