Titan - It is true that left/right is more cost effective that dedicated left, but right only is the most cost efective. Especially in the case of a "test" model, which the "R" is.
We only produced one "batch" of 1200 pcs, primarily for collectors. It is a "Specialty" design that we made on the "Gee, It would be neat to have one of these". The first "batch" is already sold to distributors/dealers. Whether we produce a 2nd batch will depend on demand (orders).
In order to continue making some of the "neat" stuff, and not create the "too many SKUs problem", for now, this method works.
Spyderco originally made 20% dedicated left hand models on everything. (surveys indicated 20% Americans were left handed). "Workers" were available in Left or right and plain or serrated. SKU nightmare, especially when upgrades occurred.
On Linerlocks, we made some lefts in C15's and C19's.
The left/right clip on many of our models is the current trend. The "R" was an exception. Hope this helps.
sal