We sold Amsoil in our parts store, which was Parts Plus and then changed when new ownership took over to AutoValue. I had never heard of any scheme and we didn't try to harness sellers. We just sold it as another choice of oil, and quite honestly, I used it and liked it as well. Not to mention, we sold a bunch of it! We had several guys with homebuilt aircraft that swore by it in their plane engines, including the owner of the store.
Never knew of the selling scheme though...