So if one includes one thing one is " good"?
why are you trying to instigate here?
allow me to spell it out. buying even one item so steal cash back is stealing and assur.
you then asked, foolishly, what about ordering different sizes. to that, i needed to spell out that you intend to buy something and arent doing it to steal from the company. but even in that case, returning it intentionally in a way that still earns cash back is stealing