Well, in that case, I'm glad it's not common across software, e.g. imagine authors having to pay MS Word or Scrivener a cut for every book sold, or musicians fo

Well, in that case, I'm glad it's not common across software, e.g. imagine authors having to pay MS Word or Scrivener a cut for every book sold, or musicians for every song made with Logic Pro or Ableton. What makes games so special?