Sites using public-key-pins-report-only:
3,019 proton.me
6,457 protonmail.ch
19,596 ddos-guard.net
97,840 protonvpn.ch
117,667 proton.ch
119,581 salzburgerfestspiele.at
173,906 trexcloud.com
311,965 pm.me
706,413 intellicureehr.com