While a company doesn't wholly own the Macross property, they do have limited exclusive rights to a particular series. That limited monopoly limits competition and better products for the consumer but without exclusive franchise rights nothing may be produced since a company may not risk the capital to develop a product without that protection.
Just based on economy of scale, size of production not the size of the model, there is a point were the unit cost is lower because the cost of production can be shared over more items.
And if you want an ugly non-matching scale Bandai model, just look at the old Zaku Tank. That will make any of the current prototypes of the YF-29, "look golden Jerry!"
Is anyone else thinking about rescanning the Sheryl or Ranka decals for use on the VF-25? Sheryl's all blue VF makes it look like she is replacing Klan.