Impressive chart leap for GPN !   
The company behind the Ultimate Chart seems well positioned to supply a credible accurate look at true popularity based on the ways music is consumed today. Will be interesting to see how well (quickly ?) their system is accepted.  And how long it takes Billboard to respond to the challenge.  
Have taken Billboard's lists with the proverbial grain of salt for quite a while.  Large part of that skepticism was due to the belief that airplay figures are affected by more than a song's actual popularity,  but also wondered if they took into account sites like YouTube, LastFM, etc. 
Thanks KC . . great example of what keeps us addicted to TIS