Yeah, but other publishers that aren't heavy on microtransactions reduce prices more and have better sales, too. Though the other stores they sell through probably
do get a lot of money through microtransactions, that's true.
I think the main factor's that Nintendo's got this weird cheap-on-the-hardware-side-premium-on-the-software-side thing going on. Which seems to be working for them—I'm not complaining, just observing, no other companies seem to have carved out a niche quite like that, so it's a distinctive characteristic of Nintendo.