Knifemakers and dealers pay money to be allowed to advertise on Bladeforums. If outsiders come here and advertise for free, we shut them down as spam. If someone here gives an outside dealer a free hit, that's also spam.
If someone in the FEEDBACK forum asks where he can buy a certain knife, it is OK to recommend a particular dealer. But not if no one asks, and for sure not in a completely inappropriate, discussion forum.