I actually wrote about this a month ago. https://steemit.com/steemit/@vimukthi/we-are-human-asics-steem-ponzi-scheme-explained-debunked

Compared to gold, Cryptos aren't REAL. They are not Tangible. Cryptos are not real assets. They have value because of what they can do. Cryptos are the hyper-gold except for being REAL. Most cryptos are mined or minted in a POW or PoS process. I see STEEM not as a social media but as a non-PoW non-PoS mining/minting process. Just think for a moment what if we could replace the Hashes and piggy back on social media activity instead.

What I love the most is the whole process having an intrinsic value. Even in PoS mining, the token/coin creation process itself has no value on its own. Steemit has built the single best mass community on the net and used the community itself as the mining process. It's Human Action within Human Action; 2 layers of pure capitalism.

Blocks are produced using DPoS. But the rewards are allocated based on the activity within the eco system. Instead of how many hashes you can do, steemit creates a system where it's about getting the most upvotes by providing value to the community. It's value on top of value. Proof of Brain/Creativity/Contribution is simply a term to describe piggy backing the token creation process on an intrinsically valuable system of Human Action.