Just to quickly add another opinion: I suppose the higher price point could be they're expecting to sell less units (they're specialised models - diorama pieces, specialised poses or character models, people don't need as many, hence probably less sales); as such to justify making these moulds they need to sell them at higher price points (the Games Workshop model, who deliberately price character models at a way higher point because they know they'll sell less of them, hence introducing a higher price point to maintain profit - is this ethical or 'right?' - whole other discussion) - making additional sprues on a mould costs peanuts, but recouping initial cost of investment on moulds can be tricky.
End of the day though, whether it's profitable for them will be up to the free market; if consumers decide it's too expensive people just won't buy them, and if people accept them, they'll make money. I personally don't care for Napoleonics so I'm not the target audience so I'm even in the equation but relative costs in 1/72 is also compared to other discretionary income expenditures - computer games, the pub, sports. If a $1 snack I liked doubled 100% to $2 I might not care because it's nothing out of total percentage income, but a 100% increase on a Buggati is going to burn holes in the theoretical wallet. Money also has different value to different people, etc.