Refereum is developing a blockchain-based affiliate referral ecosystem that is focused on gaming. Their goal is to develop a decentralized affiliate marketing platform that will be powered by the Ethereum-based RFR token, and will enable on-chain attribution for marketing engagements. Refereum places an emphasis on gaming, and their platform allows game developers to create incentivized quests that reward game players for completing in-game tasks.

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.