"Cost" was also my thinking. Each step less, is that much less time, which would be that much less Man-hours (or Woman-hours) (Woman-hours may be even more expensive

) (just kidding, Mrs. Diane/CCM Mom!).
To engrave a bit "neatly", one may be able to find some small, maybe 1/2" brass stencils...then an engraver, and engrave nice, neat, and even military-looking stenciling on their molds. Ay, if they can "get the knack" for it, they may be able to make a few dollars by engraving others' molds.
I'd be reluctant to pound my molds with stamps, because the stamping takes hammer blows, which may warp them. Oh to the No.