I'm not sure about the ppm, but there is a slight black residue when you wipe your dipstick, so I imagine it is plenty. ppm does not accurately measure it anyway, since these are .5 or 1 micron particles of the actual MoS2 in suspension, not dissolved. these little tiny particles is what gets into the tiny ridges in the surface of the metal, which looks smooth and polished to the eye, but under the electron microscope is full of tiny pits.
Oh, I see they give the ppm as 4365. if diluted 10%, one can per 3 litres, that makes about 436ppm. 100ml in a 3.5l crankcase gives 125 ppm. adding the whole can would be 375 ppm. In my view, after the engine has been given a heavy treatment, it only ?needs 125ppm after that to maintain it.