When in doubt check the description of a token on hive-engine:

POB is a pure 100% Proof of Brain (PoB) token meaning that the only way the token enters circulation is through PoB rewards that are earned by posting and by curating content with POB staked. 1 token has been issued to @proofofbrainio to enable staking. There will be no more POB tokens issued except through PoB rewards. Like Bitcoin mining, rewards decrease by 50% every 4 years. There are no proof of mining or proof of stake rewards. There will be no tokens issued to a founder or a team. There is a 10% beneficiary percentage when posting on proofofbrain.io. Funds from the beneficiary rewards will be used to maintain proofofbrain.io.