Owners uses “MANA” to transact in Decentraland. As Decentraland is a ERC20 token, it uses PoS as consensus protocol. According to their whitepaper, the consensus protocol takes places at three different layers depending on the user action.
The 3 protocol layers are as followed:
1. Consensus layer: Track land ownership and its content
2. Land content layer: Download assets using a decentralized distribution system
3. Real-time layer: Enable user’s world viewers to connect to each other
Currently, there is no underlying cost to run a smart contract on decentraland. Users pay directly what they use or purchases in the virtual world.