More details here https://vitalik.ca/general/2021/08/16/voting3.html
He goes around vote buying in dpos, cartels etc ....
Again, although far from perfect Hive governance excel a lot from all the top proof of stake models.
Starting from tokens distribution, no one has more than 5% share, to long timelock, unoficial social reputation, and the latest time delay of new stake powered up.