>>37159081Because fuckers are lazy.
Artists are using pixiv less and posting more on twitter. Almost always an image will be posted first on Twitter even.
Danbooru users don't bother checking Twitter tags as much since it's a hasle, so they mostly just upload the pixiv stuff - much better tagged, so i get it.
Gelbooru users mostly just run automated uploads from danbooru, few do their own reps.
Because we all know she got like 500 images from the CowFauna craze, many good enough to upload, but no one did.