Yeah Fastly (github's CDN) is ridiculously expensive and they charge for requests just like cloudfront which can become very expensive. They are the only major CDN provider other than cloud services which charges for requests.
We went from cloudfront -> edgecast -> keycdn and our bill dropped from $3000 -> $500 -> $120
Edgecast when you buy is through a reseller is quite cheap but we moved because we needed custom domain SSL which is quite expensive in edgecast
We went from cloudfront -> edgecast -> keycdn and our bill dropped from $3000 -> $500 -> $120
Edgecast when you buy is through a reseller is quite cheap but we moved because we needed custom domain SSL which is quite expensive in edgecast