This feels a little like asking the revenue per pound of a person. If two people earn the same amount, and one if more slender than the other, the slimmer perso

This feels a little like asking the revenue per pound of a person. If two people earn the same amount, and one if more slender than the other, the slimmer person makes more per pound than his friend. If he were to increase his weight would his earnings increase? I suspect they won't. This is like the view that Craigslist could increase their earnings by hiring employees. Companies like people are organic complicated things. Reducing them to ratios is essentially meaningless.