i think theres more holding it back then that.
when you consider the production side of knife making, folders are simply more labor intensive. The larger fixed blades are more machine intensive, requiring more material to be removed, and larger quantities of chips to be made, but it's a machining operation for the most part, rather then a parts handling operation.
folders, unless your willing to set up an automation line which would cost lots and lots of money -especially- for short runs, your gonna have a lot of people spending a lot of time putting them together.
you could say "but they'll sell out immediately" and probably be right, but to get them to that stage initially would require huge amounts of production set up and rearranging. it's easy to think of busse combat as a giant money bank given their sales records, but a business is a business, and there is more that goes into business decisions then just saleability of product. Why turn a portion of your shop upside down when you've got 2 years of fixed blades already planned out with the machines pre-prepped for the work?