TIL about third-party trackers using CNAME cloaking. https://medium.com/nextdns/cname-cloaking-the-dangerous-disguise-of-third-party-trackers-195205dc522a
NextDNS is one of the DNS-over-HTTPS providers in Firefox and it blocks this shit by default, so I am using it now. https://support.mozilla.org/en-US/kb/firefox-dns-over-https#w_manually-enabling-and-disabling-dns-over-https