Proof-Of-Capacity
MC² users earn TFT via Liquid as monthly income for connecting Internet capacity to the Network via the ThreeFold Grid.
Proof-Of-Utilization
MC² users buy TFT via Liquid to store data and run applications privately on a peer-to-peer Internet infrastructure.
TFT is just one form of the Liquid current-see in order to incentivize participants to operate the MC² Network on the distributed Grid on behalf of Universes, flows, communities, apps, dApps, and users, similar how Holofuel is used to incentivize the same for Holochain hApps.