@dfhertijkt
Estimate CAC via on-chain data: divide total marketing costs (e.g., airdrop token value, ad spend) by new users. Reasonable CAC ranges: Layer1 (≤$100/user), DeFi (≤$50/user), NFT (≤$30/user). Evaluate low-cost strategies: community 裂变 (referral programs with small token rewards) is cost-effective if referral rates exceed 20%; airdrops work if ≥30% of recipients become active users. The ideal LTV:CAC ratio is ≥3:1—boost LTV by improving user retention (e.g., loyalty rewards for long-term staking).