Quote Originally Posted by VeloZer0 View Post
I don't know either way in this case; however I do know that when official guides quote game mechanics they are right more often than not, but wrong enough of the time that I wouldn't consider them the final word.
Given that I originally thought that they stacked but when I took all bar one off (after finding out they don't) there was no evident difference in how often I got ingots/traps/etc, I would be inclined to agree that having one is no different to having four.