We need not ask the company about Zukav, we can determine it ourselves. That is what is so great about these independent ranking sites. I remember well the day after RSW went Mega...we shareholders who follow Appshopper/Appannie, knew immediately that is was a big hit.
I would say no sales yet from Zukav aside from I imagine 2 in-app purchases (you can see this on Appannie "App Details" section). MRNJ did one update (Dec. 4), and I checked with IR, there is one other small one on the way. As they said, soft launch, get feedback (or I imagine check/fix bugs), do updates, then do promotion/marketing (which would include Mr. Zukav doing it too). So, not at promotion part yet.