Thanks for posting that--and keeping this thread alive--It has been pointed out to me that, particularly with ASCAP publishers, certain types of royalties apparently are essentially split among members with a prejudice in favor of the companies that founded the organization--as it was explained to me, extending the copyrights essentially means that they continue to collect a slice of the pie, even if no one uses any of the material they hold the rights to--
I may be slightly inaccurate on this, since it has been explained to me second or third hand, so if anyone can add or clarify (or correct) it would be appreciated--