So, some series completely lack a cover image. While I totally understand why graphic/sexually explicit covers should go, the lack of covers for series that had (presumably) spoilery covers confuses me. Assuming that the series have some covers that can spoil plot points, can't someone just put the cover of the first volume as the image and just prevent anyone from changing it? I think Naruto, Bleach, Magi and Case Closed for starters should all have some sort of image instead of being blank like they are now.

(And if someone can enlighten me as to why Case Closed's covers got marked down for spoilers when they're literally all the same, that would be great).

I can't say for sure, since I'm not part of that side of things, but I assume it's to help avoid any sort of copyright issues for some of the bigger series.

We had DMCA takedowns many years ago over the images

A just ruler amongst tyrants