CDNs have been doing this for years. It's nothing new!
So, are there CDNs without their own racks anywhere?
See "Edge nodes": https://peering.google.com/#/infrastructure
Obviously anyone streaming video, it's different.
I wonder if BBC iPlayer (major streaming service in UK) collocate with ISPs.
Will those servers have a local (to the ISP) IP, or do the Akamai IPs get physically routed to the AS?
Fascinating stuff.