What a shitshow to wake up to... Fuck Kakao Entertainment, may they kill themselves.
Replacements: Mangadeamon, Mangasushi, flamescans, Mangabuddy, Mangakakalot... Diversify your library while the dex extension still works. Some scans on those btw get updates before Dex does.
Edit: this company was registered in 2021... They definitely don't have a case as mangadex has been there longer than this and same with the extension. Fuck those greedy bastards, if you know someone using anything from them, give that person a educational slap.