Digital citizens are everyone around the world who can use and access PLEXUS without time and space constraints.
Protocol contributors are people who either contribute their labor, work or knowledge to the protocol or attend the PLEXUS events. Protocol contributors are rewarded PLX tokens depending on the difficulty/complexity of the work. Any digital citizens can become protocol contributors in PLEXUS. Protocol workers will have incentives in weight of the governance power(Details).
Governance members are gPLX holders. One can obtain gPLX by staking PLX tokens. Governance members not only share the revenue generated by the protocol but vote on major governance proposals and operate the protocol.