Точно. Там люди ходят. Не самые посещаемые сайты, но все же...

curl -H 'Accept-Encoding: br' -I https://site.address/
HTTP/2 200
server: nginx
date: Thu, 21 Jun 2018 07:23:26 GMT
content-type: text/html; charset=windows-1251
vary: Accept-Encoding
set-cookie: PHPSESSID=ec9c7427c1ee83392f44a606f0dc8245; path=/; HttpOnly
expires: Thu, 19 Nov 1981 08:52:00 GMT
cache-control: no-store, no-cache, must-revalidate
pragma: no-cache
strict-transport-security: max-age=31536000; always
content-encoding: br