All early Farcaster users (FID < 20k) are now eligible for based ETH and TYBG.

If you are not early, you will become eligible when you receive an active badge. 

All your base are belong to you. 

https://basedinstitute.deframe.it/frames/base-drop

The Institute is will be adding additional claim criteria to welcome more people. 

What NFTs or other onchain characteristics should be eligible?

Base is for everyone.

The Based Institute was created to study What It Mean To Be Based, the origins of the Base God, and other early Base cultures.