I'm not paying any more than I am now. For a simple reason. There are only about three shows I watch on there, and all of the serial killer docus they have done. As such I only watch it for about 4 weeks out of the whole year and continue to pay any way as my brother uses mine.
I suppose if you were a big film buff and watched the crap out of it every day it would be worth it, but for me it's not. I watch Prime about as much, but there are other uses for that beyond the watchable content.