W³Techs also understates the fraction of "web sites" that use LE certs because it counts only the 10,000,000 top sites. But LE alone has current valid issuance

W³Techs also understates the fraction of "web sites" that use LE certs because it counts only the 10,000,000 top sites. But LE alone has current valid issuance covering over 30,000,000 subject names, most of which are small sites not in the top 10,000,000 sites by traffic volume or search engine ranking. https://w3techs.com/technologies https://w3techs.com/technologies https://letsencrypt.org/stats/ https://letsencrypt.org/stats/