Pretty limited period of time to produce a zimmed version for (1 month of production), but they already had the molds so I guess it was worth it in their eyes.
I did find it interesting to see them announcing an all new-tooled SiG 33 auf Pz III kit...they are steadily continuing the updating/replacement of the 20-yr old Pz III line one by one. That's a good sign IMHO as it dovetails with their CH Orange Box strategy of squeezing out as much as possible from the older molds before they release a Smart Kit.