It's static content in Cloudflare CDN. Seems unlikely that many requests actually hit any kind of origin server. If I were building something like this the origin would be Cloudflare R2 (or similar) object storage, with a very long cache lifetime. Nothing to update, nothing to maintain.

But beyond that, what are you referring to as compression? When I look at the source I see a VERY short easily human-readable HTML page. It doesn't have newlines, but I wouldn't consider that compression. It also references a short, but non-obfuscated javascript file at https://example.com/s.js .

Maybe I misunderstood what you're referring to...