I could see a case where distribution (printing, deals with retailers, etc.) and ongoing support (over the lifetime of the product) adds up to over 50% of the p

I could see a case where distribution (printing, deals with retailers, etc.) and ongoing support (over the lifetime of the product) adds up to over 50% of the price of the software. In that case, 50% of the profit is quite fair, but 50% of the revenue is definitely not, because that would require the writer's company to operate at a loss.