The term "STO hodler airdrop" typically refers to a distribution of free tokens (an airdrop) to individuals who hold a specific Security Token Offering (STO) token.
This is often done to reward early investors or loyal holders, increase token distribution, and build community engagement around the STO project.
Eligibility for such airdrops is usually determined by holding a certain amount of the STO token in a designated wallet at a specific snapshot time.