How would you train all those people to recognize every copyrighted item? Just every copyrighted piece of music would be impossible. A computer is going to have a lower error rate on this than any group of humans.
I was surprised to find out not long ago that you no longer have to pay. I don't pay them anything and I'm using IMAP with mutt to read yahoo mail.
Still not sure when this change was made but I suspect it was fairly recent (within the last couple of years, max).
The universe is an island, surrounded by whatever it is that surrounds universes.