Why would Tumblr ban porn immediately after 11 years of porn? Yet inspite of D’Onofrio’s assurances, the NSFW ban will immediately have an affect on artists, sex personnel, and some others who depend on the platform as a welcoming and inclusive area to go over and depict diverse expressions of sexuality. Tumblr, founded in 2007, was acquired by Yahoo in May 2013 for $1.