Even the most popular 1st party titles aren't even close to what I stated earlier. 50 % rate is just crazy even if you want to count it outside of the norm.
Before the Voucher program, I would have fully agreed.
But since with the voucher, buying it digitally is much less expensive in Japan (as in, the equivalent of 10-12 dollar cheaper on top of getting full gold coins for it in the e-Shop), it does boost digital sales by a lot.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/