I've just received my daily e-mail from SQLCentral and part of it is an automated list of new/active topics on the forum. And guess what? Several promoting kitchens! (Obviously not as diligent as our moderators!)
I have heard it said that the spammers wouldn't do it unless it was profitable but who on earth would seriously consider buying a kitchen from a company that spammed electronics / programming forums? And probably many others.
"I'll just log onto the forum to see if anyone else has had problems with their chromium plated gimlet. Oh, look, I might buy a kitchen..."?