Why does D4 gold pick up text contain "+" sign?

Looking at early gameplay videos over the Internet, it looks like whenever character picks up gold, short text desciption shows up.
It contains plus (+) sign, gold icon and amount of gold with text “Gold”. I have no idea why the plus sign is there in the first place, does it mean it’s possible to gather negative amount of gold too? Or devs just put totally redundant character displayed everytime someone picks up gold.
This seems like something that should be removed, doesn’t it bother anyone besides me?