1, It must be backed by popular VCs
2. Raised money from the investors
3. Trusted and reputable developers
4. The project is also fully audited
5. It was running incentivized campaign to the users


Gave you an example for the eligibility criteria for the taiko airdrop.

Look at that, taike backed by big companies and VCs, the project has raised good amounts of money, reputable and fully audited projects. They pay 5% token of total supply for the airdrop participants.

Joining a project that has allocated a few percents to be airdropped is a must.