i like how a LINA users can receive Lina token rewards by writing their reviews on the services and products on the Lina Platform, this will encourage users to give reviews irregardless if it is good or bad and these reviews would be recorded on the Lina Core private blockchain. But what i don't understand is, why is there a need for Lina users reviews be subjected for approval by Lina review staff and needs to get votes from Lina helpers? Does this mean bad reviews of Lina users could be deleted