2Key network is a blockchain based platform for building referral campaigns. 2Key allows users to create and manage online campaigns that are powered by smart contracts. The Ethereum based 2KEY token is used to activate campaigns and to reward users for their participation.

MetaX is an AdTech company that is developing a blockchain-based digital advertising platform. They created adChain and adToken to serve as a decentralized solution for digital advertising. Their Ethereum-based adToken (ADT) powers the adChain registry.