Who is eligible for core airdrop?

I'm curious to know, who exactly qualifies for the coveted CORE airdrop? Are there specific criteria that need to be met, such as holding a certain amount of a particular cryptocurrency or participating in specific activities? Are there any geographical restrictions that might limit eligibility? Additionally, is there a way to verify if one is eligible for the airdrop before it takes place, or is it a surprise announcement after the fact? Clarifying these details would be greatly appreciated.