Yes I know that this coin is not an overstrike. i don't see what the big deal is about using pre struck coins. If you are using an MS 65 1893-S, then yes. If the host coin is an MS 64 or less common date Morgan/Peace dollar, then what's the harm. If one thinks this is wrong then go out and buy a couple of thousand of the host coin and save them from what you might think is wrong. Same theory with St. Gaudens double eagles along with ASE and AGE.
The man does good work. I bought a few from him and never had a problem with what he is doing. Here's the 1964-D Peace dollar I bought from him.