What is an Airdrop program of Tezos? :-)
As I know there is no airdrop at the moment
Moreover airdrops are usually made for new projects and Tezos is already established one)
As far as I know, there already were an airdrop from August 17 to August 24. Participants had to follow project`s twitter and download the wallet. Airdrop members were able to share 5000 Tezos, each getting a random amount.