Greg,
Everything is quite closely related. The extra large sideplay makes it easy for the oil to escape and go flying around, the crank turning fast makes it looks like a cyclone, a lot of oil splash around, a big part of this oil goes to the cylinders, much more in fact than it would normally goes, the piston is much shorter than the stock one, so easier for the oil to get to the rings, and the rings assembled in a piston that is less stable in the bore for some reasons, it's shoter, it's tied to a rod with a lot of endplay in the crank, and the rings itself are prolly thinner than the stock ones etc... and gather it all togheter and You have a sure answer to why it should not be any good to the engine!
But anyway, have in mind that nowadays is much easier to learn, there is the wonderful www, a bunch of cool books like Santucci's one etc... some years ago it was much harder.
