Ah! I wasn't aware of that. Yep... with that particular intel I'll take it so far as to suggest their pricing revisions are specifically to discourage modelers. We're a lot of trouble, frankly, requiring fine detail, dimensional accuracy and defect-free output. Art, especially organic forms, is "never perfect", and there's much more built-in tolerance.
I think you hit the nail on the head. I like the service bureau model though - Wonder if a "Shapeways" like service targeted at modellers (rail, vehicles, military, ship, etc could make it?