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(Credit: Kasin Visrutavanij/iStock)

Tumblr's crackdown on adult content appears to be hitting the site hard.

Similarweb, a web analytics firm, reported that visits to the popular blogging site have dipped significantly since the December pornography ban. On Dec. 3, total Tumblr views on desktop and mobile were at just over 520 million. As of Jan. 28, views had dropped by more than 100 million, according to Similarweb.

SEE: The reason Tumblr vanished from the App Store: Child pornography that slipped through the filters

In November, the Tumblr app vanished from the Apple App Storeafter child pornography slipped through the company's content filters. Tumblr announced a ban on all pornographic content shortly after.

"We made a strategic decision for the business that better positions it for long-term growth among more types of users. This was the right decision," a Tumblr spokesperson said Thursday in an emailed statement.

The ban got off to a rocky start. Users complained about the inconsistency in blocked posts or and ultimately found ways around the flagging process. Other users said images were incorrectly hidden.

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Shelby is an Associate Writer for CNET's Download.com. She served as Editor in Chief for the Louisville Cardinal newspaper at the University of Louisville. She interned as Creative Non-Fiction Editor for Miracle Monocle literary magazine. Her work appears in Glass Mountain Magazine, Bookends Review, Soundings East, and on Louisville.com. Her cat, Puck, is the best cat ever.