What are some alternatives?
raw.githack.com - raw.githack.com serves raw files from github.com with proper Content-Type headers (like rawgit.
Statically - A free, fast, & modern CDN for open source projects, WordPress, images, and any static assets.
GitCDN - Serve raw files directly from GitHub with proper Content-Type headers and super fast CDN!
jsDelivr - A free, fast, and reliable Open Source CDN for npm and GitHub with the largest network and best performance from all OSS CDNs. Serving 20 billion requests per month.
Staticaly - Free CDN for Everyone! Load Project from GitHub, GitLab and Bitbucket more easier
GitHub Pages - A free, static web host for open-source projects on GitHub