Worth it or not?
My understanding is, this comes more into the case when google sees multiple sites with the same content. They check to see if they are within the same class c address block to see if they may be the same publisher. All Class B and Class C mean is how big a block of addresses one subnet is.Worth it or not?
So we could assign an IPV6 address to EVERY ATOM ON THE SURFACE OF THE EARTH, and still have enough addresses left to do another 100+ earths.