You think poser would have to sell to all of its existing userbase at that price to do those things? 

If poser sells more copies of its software than other companies they would not need to charge each user as much for the same cost of development.    Unless we can analyze how many copies of poser they sell each time they upgrade there is no way we can say how mcuh they woudl need to charge for a new feature. 

 

If poser has a larger userbase then they can add very expensive and complicated features without increasing the price very much for each copy.   I just don't know if they do have a larger userbase than other high end programs.