Tolkien ping!
This apparently happens a lot. The authors of books and writers are at the very bottom of the totem pole. Which is another example of how backwards hollywood is...the very people who CREATE the thing are least valued.
I recall Winston Groom had to sue over Forrest Gump because the studio tried to claim they didn’t make a profit. If memory serves, his cut came after all “expenses”. I don’t recall the outcome of the suit, but to claim that movie didn’t make money is simply laughable.