I believe the "x-nananana: Batcache" header is included on some/all WordPress sites hosted by Automattic. "curl -I https://automattic.com/" returns it as well.
I'm surprised Caddy isn't more popular. I use it to serve my blog and reverse proxy a few services and it's completely hassle free. It's much better than nginx in that respect, especially if you include TLS termination.
Replit does hosting now for any language they support, so I’m surprised none of the sites were hosted there—- although I guess some could have been with Cloudflare in front..
Do you know what headers I can use to identify repl.it? a quick `curl --head` tells me `replit-cluster` is an option but none of the scraped sites had that response header.
And, agree, very interesting and fun! Thanks for compiling and presenting it!
edit: here they are!