Yes but that should be an organic thing from within Nintendo.

On the other hand pushing it hard so it becomes a 'thing' would leave a bad taste in my mouth. Although rewarding OSS is something every major company should strive for (In Nintendos case specifically I'd be personally be surprised given what I've heard about Japanese corporate culture, but I'm just speculating here).

But it is indeed a good marketing strategy, at least if the HR and marketing teams were even aware of such things (ie, people who have control of sending out freebies). Which is why having technical leadership throughout the company always helps. Ultimately it will come down to an organizational thing.