You know how some vendors just flood the market with cheap, replicatable junk? Or worse yet... data merchants who love selling their data samples ONE... ITEM... AT.... A.... TIME...? Imagine what would happen if they could put say... more than 40 large hypo's at any given time?
The exchange flooding problem would get worse.
As for me, I never seem to have a problem. I only deal with medium to high quality merchandise and rarely do I hit that 40 item ceiling.