yes indeed :) https://www.epicgames.com/fortnite/en-US/news/postmortem-of-service-outage-at-3-4m-ccu https://www.epicgames.com/fortnite/en-US/news/postmortem-of

yes indeed :) https://www.epicgames.com/fortnite/en-US/news/postmortem-of-service-outage-at-3-4m-ccu https://www.epicgames.com/fortnite/en-US/news/postmortem-of-... They mention 3.4 million concurrent users online. From what they say on clustering, it looks that this is also ejabberd.