The PURITANS took over Tumblr

“Starting today, we will begin flagging existing adult content, with the ultimate goal of removing as much of it as we can. Additionally, after December 17, newly uploaded content flagged as adult will no longer be allowed on Tumblr. This change will be in effect for all Tumblr users, regardless of age.”

https://tumblr.zendesk.com/hc/en-us/articles/360011800233-December-3-2018-Updates-to-Tumblr-s-Community-Guidelines-