Commercial accounts get significantly better rates, I've seen at least one startup whose business model is passing along the commercial rate to consumers for a

Commercial accounts get significantly better rates, I've seen at least one startup whose business model is passing along the commercial rate to consumers for a small cut of the savings (my quick search is only finding pirateship.com but that's not who I was thinking of). Similar thing happens on Ebay when you do your shipping label through them (not sure if they're actually taking a cut or just passing on their better rate though).