When Yahoo bought Tumblr, it suggested that its adult and porn blogs would be left alone. Users found out this wasn't true when a new adult blog search policy went public on Thursday, capping Tumblr's quarantine on adult content, which now also includes excluding adult blogs from Google, Bing, Yahoo, and other search engines.
The changes render an estimated 10% of Tumblr's userbase invisible and unfindable. Now, around 12 million Tumblr blogs marked "adult" have been removed from Tumblr's internal search; this follows the revelation two months ago that adult blogs were no longer indexed by Google, and the pre-sale removal of Tumblr's "Erotica" category from its category index.
Tumblr's "Erotica" category had been launched in January 2010 with much sex-positive fanfare - it would appear that the days of Tumblr's tolerance are long gone . . .