To screen high-value airdrop projects using on-chain data, focus on these steps: First, analyze transaction volume and active addresses to gauge project activity—high engagement often signals potential. Second, check token distribution metrics, like holder concentration and Gini coefficient, to ensure fairness and avoid manipulation. Third, examine smart contract interactions for transparency and security; reputable projects have audited contracts. Fourth, track historical airdrop performance on platforms like Bitquery or Nansen to identify patterns of success, such as low sell-off rates. Finally, verify team credibility and partnerships via on-chain fund flows and wallet activity. Prioritize projects with consistent user retention and low fully diluted valuation (FDV) to maximize returns. Use tools like Dune Analytics or Glassnode for real-time insights, but always cross-check with community sentiment to avoid scams.