Look up that one genshin fuck up on the internet. Their kernel anticheat was used by ransomware to completely take control of people’s PCs. Best part? You didn’t even need to have genshin installed, because the AC was bundled with the ransomware, and Windows would install it as it was “trusted software”
Dunno why it’s down, could be them forgetting to renew the domain or another issue. I don’t think that was on purpose.
However, owner and devs are using the downtime to change some infrastructure internally, and that’s why it hasn’t come back up yet.
ETA for recovery last tuesday was ~a week, so I’m guessing it will be back up soon.