[jtthe13]

An easier analogy is the ad industry term « inventory ». When you want to commit to buying very large quantities of inventory you might want more guarantees, discounts and other specific terms that wouldn’t be feasible or reasonable in small quantities. It happens for goods, and it’s roughly the same B2B negotiations for ad space. That’s also why most big advertisers never pay the actual rate card price of an ad slot. In TV or print, I’ve seen many discounts of over 50% on the official price for large ad buy commitments.