It is also done because it works better with the i-trader feedback. Honestly, PP is pretty good about his bumps; they are less often than the once per day minimum allowed. The other person with a lot of parts on here right now who I think is the one you are referring to, is also at average of a bump every 3 days or even less often.
I personally don't see that big of a deal, and any new rule would have more downsides than up.
Michigan- The Only
Great Lakes State South of the Mason-Dixon Line.