What are some alternatives?
RawGit - RawGit serves raw files directly from GitHub with proper content-type headers.
CloudFlare - CloudFlare can be used by anyone with a website and their own domain, regardless of your choice in platform
raw.githack.com - raw.githack.com serves raw files from github.com with proper Content-Type headers (like rawgit.
Amazon CloudFront - Amazon CloudFront is a content delivery web service.
GitCDN - Serve raw files directly from GitHub with proper Content-Type headers and super fast CDN!
KeyCDN - KeyCDN is a high-performance Content Delivery Network (CDN). Lowest price globally at $0.04/GB with HTTP/2 Support and free Origin Shield.