Yeah, I don't think that that argument works at all. The price does not increase due to "shortage", it increases due to an increase in consumers' willingness to pay. Going by the Netflix example, if Netflix realizes that not too many people will cancel their subscriptions if they were to increase the price by, say, 1 dollar, they would certainly increase the price.
Consumers' WTP is the reason why digital goods are priced differently in different markets. Many digital goods are sold for much cheaper in India compared to developed countries because the Indian market is much more price sensitive. For instance, Netflix costs only about half as much in India as it does in America.