The simple answer is that our pricing method isn't made to go hand in hand with this.
FUD price never changed since it's launch back in 2010 (? maybe 2011?), back when we did not have any experience with this material and we didn't print it in house yet.
As you know, the required support material changes for different orientations, and the higher you go, the longer it takes to print (more chances of the printer crashing) and some other things aren't included in the current pricing method.
Let's take this example:
The train is 5cm3
Best output for this train would be to print the model as shown in the picture.
With this orientation it will require roughly 58cm3 of support material (the whole inside is filled to support the roof).
If we flip the model, as a bathtub, the way we currently print trains, it will only require 13cm3
And printing it vertical will take roughly 42cm3 (but printing takes wayyyy too long this way).
So for optimal result to balance price vs quality, it's printed bathtub style.
I'm not saying I disagree with you, ShopOwners should have the option to change orientation.
But this would require a lot of thinking and exploring, in terms of how a new pricing structure would work and be executed.
I'll definitely forward your feedback to our materials team as it's definitely something that could benefit everyone!