We brought this thread to Yoshida's attention and here's what he had to say:
This is an interesting idea.
However, we are currently aiming to get a solid monthly subscription base for ARR. I previously mentioned this in interviews, but there are various types of business models and new business models still being introduced, so once we establish the proper monthly subscription base, we will look into other business models.
So with that said, we can't really say whether or not we will do it currently.