It seems like a bad strategic decision to try to build a CDN on top of a platform that already offers a CDN while expecting to be cheaper than their economy-of-scale-driven CDN.
Not to say that you couldn't build a CDN on AWS, but if you're going to do it, wanting to do it for cheaper than someone who doesn't pay markup on the same instances (Amazon) isn't realistic.
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That may be true, but try building a CDN on top of AWS and you'll be out of cash pretty quickly with their bandwidth prices.
It seems like a bad strategic decision to try to build a CDN on top of a platform that already offers a CDN while expecting to be cheaper than their economy-of-scale-driven CDN.
Not to say that you couldn't build a CDN on AWS, but if you're going to do it, wanting to do it for cheaper than someone who doesn't pay markup on the same instances (Amazon) isn't realistic.
This is true, but not all content is fit for CloudFront or other CDNs.