Before a blockchain launches for real (mainnet), developers run a test version, a testnet. It works exactly like the real network but uses fake money. They need real users to click around, make transactions, break things and stress-test the system.

Your role: be one of those testers. You connect your wallet, complete tasks (bridge tokens, make swaps, mint NFTs, run a node) and accumulate activity points on the protocol. When the project launches its real token, early testers often receive a retroactive airdrop, sometimes worth hundreds or thousands of dollars.

This is one of the highest-effort but highest-reward methods. The famous examples: users who tested Arbitrum, zkSync or Starknet before launch received massive airdrops. No guarantees — but the risk-reward ratio beats most alternatives.