Yes, that looks like Brianjapan's original description. Upon initial release it would be logical to think there were 10 sets awarded. In present time, we have seen more than 10 in circulation.
If the seller on YJ! continues to list the sets, then it will be almost impossible to understand how many sets actually exist.
At least half of the sets you see circulating are from that same seller. The seller also has information that would help us determine how many sets exist. That seller literally and figuratively •_•)( •_•)>⌐■-■(⌐■_■) holds all the cards.