Because, to be completely frank, the people who this is going to effect don't buy their products in the first place. It's always the pirates who whine about how Nintendo treats their "loyal customers". Their actual customers, meanwhile, simply buy, play, and enjoy those games.
That being said, this change combined with the "lol, no class action lawsuits" change are draconian. I'm curious which US law you believe this violates. Because it would be interesting to see what might make Nitntendo walk this back.