that's quite unfortunate but certainly the team has reason behind it, of course even the fact that zksync airdrop is still unclear already speaks a lot that one shouldn't have many expectation, but it's always worth it to just follow around the trend just like arbitrum.
Given the previous experience of distributing such airdrops, we see that such a distribution can occur several years after the launch of the main network. So the main Arbitrum One network was launched in August 2021, respectively, to expect an airdrop from Zksync Era this year does not look real.
that's true, I've seen the eligibility criteria of arbitrum airdrops shows that there's at least 9 months of time for everyone to do some transaction within the chain, i'd say something similar would be the case for zksync and any other L2 airdrops, so if someone tries to try the chain out, they still have quite long time left.