It's purely economies of scale.
Legal stuff
1. This is my opinion.
2. I am not singling out one person or product or company. ( Crikey it's getting bad when you need to start every post like that ).
Mil topics dont sell as well ( numbers wise ) as GA/Tubeliners, This is a fact. In the current simulator space it's almost 3 : 1 .
However.
Xbox is coming. Some rumours are it's about 3 -4 months on from the pc release. the reason why this is a good thing from a Military aficionado is most console users I know ( I am one ) are "I have a spare hour and I want to take up a spitfire and fly around like a lunatic for a while ". Now for the hardcore this is sacrilege. This is the sweet cherry on top though.
As more of these type of users come on board the scale of the market increases. This then means that it becomes financially viable to make a military subject. Further to this as the scale of the market increases the price actually goes down. Look at the price of a harley davidson/indian in America as compared to Oz. purely a function of population.
I know of a number of devs that would have no issue in selling a product for under 10 dollars to 1500+ people worldwide.
So sounds odd but if you're into "interesting" or military addons then you actually need to pin your hopes on the xbox release doing well.
Didn't realize how much more popular the tubeliners and GA stuff were compared to military hardware - thanks for your insight!