That's Eric Glesser presenting and the Domino is his design. This was probably at an event like SHOT where he presents new blades all day long, I'm sure it was just an honest mistake unless he really meant it and the production version will be 2 way only.
As a right-hander, I'm being selfish to say, but I'd rather them not have those holes on the scale side.
I'm ambidextrous but I prefer to carry my knives on the right. When I make scales for them I rarely make holes for left carry
And the Southard was the first spyderco flipper. Here some scales I made for mine
