Zksync is coming sooner or later, days ago they have released their ZKsync ERA which is their Mainnet, if you want to qualify for this airdrop, you will have to do some transactions on the Mainnet too, I know some have done a lot of transactions on the testnet and the zksync 1.0 lite version, remember that this is the Mainnet, Bridge your wallet to the Miannet and start doing some transactions before its too late, ZKsync will be bigger than Arbitrum airdrop.
It should be bigger, yes. You can get the zkSYNC airdrop by performing tasks on Zealy io. There are also bounty tasks for other projects like Lamina1, Q Blockchain, and Layer0.