You are right, basically anything that saves my time I would treat it as having "solid utility".
Since I wrote this comment, I have also started to understand the utility of cashbacks, many smaller players rely on this and although cashbacks were not initially meant to be part of the market structure, they have since been embraced by many. Therefore, I do not wish to "kill it", I simply hope to bring a little more incentive to build the selling side of a market too.
However, the main purpose of this proposal is still to fund the DAO + reduce the circulating supply of DECs.