Rejection of Accurate Cast Additions #2. Why?

There continues to be a great discrepancy surrounding the acceptation or rejection of cast additions for Background Actors, Extras, Dancers, Musicians etc. who appear or are heard ON-SCREEN and who have ON-SCREEN CREDITS.  Their rejection is a great discredit to these performers, and belies IMDb's trust in ON-SCREEN CREDITS.

I can give you examples of both, but IMDb needs to clarify its policy.

I, of course, think that ALL ON-SCEEN CREDITS should be honored with an eared listing on IMDb.

P.S. It is also disrespectful of contributors who take the time and attention to ADD these ON-SCREEN CREDITS, all of which are verifiable in the actual ON-SCREEN CREDITS.