The MATE's governance model evolves around the community holders who participate in the governance proposal and discussion.
The current MATE's model and functionalities are never constant as the community can start proposals to modify the Mate's ecosystem.
No, it’s completely free.
MATE-BNB pair: 1 MATE in the pool = 2 MATE.
xMATE (staked MATE): Your voting power = the number of staked MATE (it will change over time as your MATE balance grows).