I dunno. But at least I can see the reasoning behind this one (whereas the sense of holding open nominations continues to elude me. Because nobody cares about process issues and the only news stories it will generate is when a nomination goes to heck). Anyway, the reasoning is that the LPoC thinks there are votes for the taking in the NPD pond, and is willing to move towards that party a bit on a 2nd tier issue to grab them. I'm not saying it will work; I'm just saying it was probably a calculated move, not Justin getting out of the shower one morning and telling the first reporter he met about this great new idea he had.
After all, something similar did work for Kathleen Wynne.