I've done some searches for plot synopses of a manga recently and somehow landed on one of these kinds of blogs, at least I think it is judging by machine translation.
What struck me about the blog I read was how little of the author's own voice is in it. It wasn't a review or critique of the manga, it was just a page-for-page transcription. The author had no editorial opinion at all, didn't even so much as say "good story" or "bad story." If there was any kind of analysis of the work at all, no matter how shallow, I would be more inclined to defend it.
"Spoiler article" is an interesting moniker, but I wonder how the conversation would go if they were re-framed as "wiki articles." Even mid-tier Wikia/Fandom wikis have about as much detail on character/plot pages as a "spoiler article" but they go one step further by having Analysis sections, Personality sections, lists of character relationships, etc. These sections rely on an author analyzing the work and writing something transformative or original about it. Can't say it necessarily would have saved them in court, but who knows.
That is an ancient fridge... And it's plugged into a surge protector hiding underneath the toilet?? I'd be terrified of this house's electrical.