Last fall, Shearer filed a $125 million lawsuit against Vivendi – the company that owns This Is Spinal Tap – for financial misappropriation and launched a website called Fairness Rocks explaining his lawsuit. He alleged that the company says the four creators between them have only earned $81 in merchandizing income and $98 for their contributions to the movie’s soundtrack over a 22-year period
[…]
Unfortunately, “Hollywood accounting” isn’t a practice confined to California. Within the success story that is the European film and television industry, which generated €122 billion in 2013, less than one-third of 1 percent[1]was shared with the writers and directors of the works created. A peculiar definition of “fairness,” you might say.

Under French law, filmmakers should be paid a fee for their work plus an ongoing remuneration proportionate to the exploitation of their creation. In reality, less than 3 percent of French writers and directors receive anything more than the initial payment of that minimum guarantee.[2]And 70 percent of all European film directors are asked to defer a proportion of their original fees (as we, the creators of This is Spinal Tap, originally agreed to do).

Source: Harry Shearer: Why My ‘Spinal Tap’ Lawsuit Affects All Creators

This happens to rock stars too 🙁 Good luck guys!