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.

AdEx is a decentralized advertising exchange built on the Ethereum blockchain. They hope to use blockchain to improve privacy, transparency, and security for viewers, publishers, and advertisers. The network is powered by the ADX token.

DATA is developing a blockchain-based data authentication protocol for the mobile advertising industry. Users will receive Ethereum-based DTA tokens for contributing their mobile resources. The network will also connect advertisers with publishers.