You become eligible for the airdrop by holding the Multichain V2 Score, which serves as your PoA Badge.
Mint your Multichain V2 Score to demonstrate your activity across 8 Mainnets in the Ethereum ecosystem. This shows X1 that you are a powerful Web3 user.
Your activity on the X1 Testnet is also considered to demonstrate your participation. After all, this is their campaign!