How much ZetaChain airdrop?

I'm curious about the latest ZetaChain airdrop. Could you please elaborate on the amount and specifics of this distribution? I've been following the ZetaChain project closely and am interested in understanding the scale and potential value of this particular airdrop. Specifically, are the airdrops targeted at existing users, or is it open to everyone? And how many ZetaCoins are being distributed in total? Any additional details you can provide would be greatly appreciated. Thank you for your time and attention to this matter.