Well, assuming you can scale past one. "Marginal" cost is the cost of, for example, serving 100 pages instead of 99. It's tiny for Internet media companies; pro

Well, assuming you can scale past one. "Marginal" cost is the cost of, for example, serving 100 pages instead of 99. It's tiny for Internet media companies; probably a bit higher for manufacturers. Some service businesses are basically all marginal cost. Scaling up or down is easy, but getting a competitive advantage is not.