The "Proof of Brain" concept was one of the driving themes of the HIVE community.
People mine HIVE and its alt-tokens by writing and curating posts. This is supposed to prove that we have brains.
The loss of the domain is sad.
I suspect the tribe will muster on without its domain.
Several tribes lost their domains. The price of the coin halves. It then picks up again after a few months.
PS: I own @buynburn . IT does not have any coins and can't give out
!PIZZA