You have presented this post in a very good way. I like the way you have expressed the understanding about the Steem blockchain and the consensus protocols, DPoS and PoW. Yes, DPoS is much more secure and scalable than the Proof of Work mechanism.

The Proof of Brain (PoB) model involves quality content, social value, community acceptance, voting through the stake weighty mechanism (SP), and rewards allocation from the reward pool.

Yes, I agree with you. The Proof of Brain actually ensures the quality of the content that is shared on the platform and supported by the curators. Both, the curators and authors have to use their brain capacity and skills to ensure the Proof of Brain.

Thanks a lot for sharing your precious post with us and I wish you a very happy contest ahead.