For those not aware, Eli_gottlieb is referring to this 2X2 http://en.wikipedia.org/wiki/Private_good http://en.wikipedia.org/wiki/Private_good Photos are Rival

For those not aware, Eli_gottlieb is referring to this 2X2 http://en.wikipedia.org/wiki/Private_good http://en.wikipedia.org/wiki/Private_good Photos are Rivalrous and Excludable as long as the photographer protects them by not posting full sized images or using watermarks. (see iStockphoto). I do associate value with that property, but that property is limited in value, not due to it not being rivalrous and excludable, but rather because of substitutes.