There is a mini-controvery in the film/publishing world right now regarding Thermae Romae which you might remember has a very famous live action version in addition to the anime. The hubbub came about when the author, Yamazaki Mari, revealed on a TV show that the royalties(?) she received for the 5.8 billion yen (58 million USD) domestic grossing movie was only 1 million yen (10k USD). She was apparently involved in no negotiations, just told her manga was turning into a movie and then given the money :lol
The internet then went ballistic and directed their ire at Fuji TV who bankrolled a good portion of the movie. Fuji, of course, denies involvement saying their negotiations were with Yamazaki's publisher and therefore had no say in how much she was getting paid.
Man, 1 million is a lot of money but that's super tiny compared to the gross.