YouTube videos not categorized as "music" by the respective content owners are not reported by YouTube to Nielsen Music, and therefore do not contribute to Billboard's charts.)
Most idiotic rule ever
It's not a rule. It clearly says YouTube doesn't report the videos to them unless they're under Music. So it's out of Billboard's hands as they can't even get the data.
Piece by Piece isn't generic but it's not a good song. That's probably what he meant to say.
The singles and the album it seems were boring and not really the best Kelly has to offer. Nothing shady meant. I hope her next album is better, she's made some of my favorite Pop songs ever.