In the game, when the Addisons all leave after Spamton "dies", some Darkners go and look in their stalls to steal stuff and then say that all of it looks like cheap junk, and they would have felt ripped off even if they didn't pay. So I figure that Spamton AND the Addisons both just sell garbage and the Addisons were just better at it than him, haha. Meaning they can both go dumpster diving together for new product! Who knows what Yellow even sells anyway...