It can be the same idea from "proof-of-burn- but the different both of them when "proof-of-burn" the user burns the token for getting a hash power for their mining purpose when this token was used other people token to burned on the smart contract. IMO still can be a problem for the user who their amount token got burned, cause they are not getting anything from the burn. The burn should be from the fee not from the total amount use they send, a lot of people will be lost for this.