I don't foresee use of a CDN saving them much or any money. Cache hit ratio would probably be relatively low and the amount of storage required at the edge to c

I don't foresee use of a CDN saving them much or any money. Cache hit ratio would probably be relatively low and the amount of storage required at the edge to cover an appreciable portion of traffic would be very expensive. E.g. their Akamai bill would be in the five figures per month if not six figures, depending on what kind of volume discount they could arrange, just based on outbound bandwidth. They're not the cheapest but also not the most expensive. Serving up that large of a media library at mid scale just isn't really a great use case for a CDN, those that have to due to transit costs becoming truly enormous (e.g. Netflix) make an enormous investment in hardware at the edge that probably isn't affordable to IA (or necessary at this point).