Agreement Ledger

A distributed Ledger used by two or more parties to negotiate and reach an agreement.
Airdrop: a giveaway of Tokens to the Wallets (Software) of users, typically for marketing purposes and increasing awareness of a particular Cryptocurrency. Airdrops are usually either free or occur in return for the user’s efforts to generate publicity, such as subscribing, posting, or sharing information about the Cryptocurrency on social media.