I can see how folks may have accidentally used an illegal piece of meat. I believe this is the original wording from their website:
The origins of Berkshire Pork, Kurobuta, date back almost 300 years when legend has ... Kurobuta Pork Collar (petite Boston Butt) 1 (approx. 5 lbs.) collar from $39.00
From this description, one would think it's just a small pork butt.
We considered ordering their KCBS pack from them last year. It doesn't appear to be available any longer.
The only thing that kept us from ordering was the "approx. 5lbs" verbage. It told us that we might waste money if the chunk came in on the smaller side.
I guess I'm glad we didn't go for it. :)
4000 sq inch Wood Burner named Brutus - KCSB member/judge# 32129