Nah, I looked at some of the estimates and it's certainly so high that it will outclass any other product they have (merchandise profit margins also vary wildly, and a 30% cut is very good in the context). Not to mention the fact, that mobile gaming spending behavior is very dependent on customer lifetime, so even with a middling retention it's ARPDAU is going grow substantially. The model definitely has room to be one of Nintendo's business pillars.Revenue that is immediately cut by 30% and fluctuates wildly based on ever changing popularity.
It's a win, but I honesty think they care most about the brand awareness. The highest margins for them are in the merchandizing which they dont have to pay for and the license holder, yet get a piece of everything.