Looks like it was just a Mass removal of the "I" word in general (Pixiv Fanbox)

EDIT: nope some L-O-L-I tags got hit too so don't tag anything got it. fucking morons dumbass site. every post that had the "I" word in it got hit even posts that had no pictures. So some inbred retard probably uploaded real IRL "I" word porn and Pixiv got scared they were gonna lose some money so they just hit the remove all button. Idk what gonna happen moving forward But i am still making a Subscribestar and will post a link here when its up and running