this looks like something like a DPoS chain where, delegates are Provisioners but in this case Blocks generation isn't a delegate's task but there other light nodes doing that. I've yet to understand why is more efficent then a DPoS system
By using Proof-Of-Blind (Dusk's consensus mechanism) to provide the sybil attack resilience of PoS with anonymity; segregating the operations of block-generation and validation/voting/notarization to make it possible to create the first economy resistant to centralised pooling attempts (which is a problem with PoS in general, DPoS is just a variation of PoS nodes are even more centraliseds to a delegated few).
Dusk's consensus mechanism has built in resistence (on the protocol level) against the attack vectors commonly talked about in literature on PoS, namely:
1) nothing-at-stake attack - in summary it is the problem with (d)PoS systems where nodes don't lose anything from behaving badly, they lose nothing by forking the chain as they will receive both coins on both chains if a fork happens. Note: this problem does not exist with Proof-of-Work (PoW) as the miner gets the most reward from being on the correct chain as that is where their hashing power lies, and;
2) long-range-attacks - because of its voting system that is built into the Dusk blockchain and is being engineered to avoid chain divergence.