Choosing the right chain directly impacts your airdrop opportunities. Ethereum mainnet offers high-value drops but comes with expensive gas fees. Layer 2s like Arbitrum, Optimism, and Base are cheaper and host many new projects likely to reward early users. Solana, Avalanche, and Cosmos ecosystems are known for generous and frequent airdrops. Participating on emerging chains like zkSync, Linea, or Blast may offer greater upside due to lower competition and incentivized testnets. Chain selection also affects liquidity options, DeFi access, and user reputation metrics, which are increasingly used in eligibility decisions. A multi-chain approach often yields the best results.