This game mentions character levels, an idea that I created when I wrote the world's best roleplaying game, 5E. I know I published 5E under a creative commons license but I changed my mind and would now like 25% of your revenue from this game.
Oh dang. I know there’s no way I can fight your team of lawyers, so I’ll go dig up the author and mail you his gold fillings right away. That should cover your share of profits for the day it’s been out.