There was a sentence that Amazon's metric isn't influenced by big fonts or other formatting choices (they probably just use a plain text version of the text to define what a "page" is) and 'that the KENPC system (Kindle Edition Normalized Page Count) recorded pages read with “high precision”' - which doesn't actually mean that much.
Did I miss the interesting part?
My point was mostly based that I know it was that way for a long time, and that things like stuffing or those newsletter signups or competition in the back of the book wouldn't have any influence if it still wouldn't be this way.