Now, any personal blog that flags itself as “mature” is not accessible on the iOS app — users will see a pop-up explaining that the content has been hidden because of “potentially suggestive or explicit content.” Tumblr also said that certain posts will be hidden in the search function and on user’s dashboards — which shows recommended posts, as well as content from the users they’re following.

“In order for us to remain in Apple’s App Store and for our Tumblr iOS app to be available, we needed to make changes that would help us be more compliant with their policies around sensitive content,” Tumblr wrote in a blog post.

Tumblr users developed an unofficial crowdsourced list of tags that the Tumblr app has banned on iOS in order to comply with these policies. Some of the banned tags make sense for a platform trying to scrub itself of sensitive content — “porn,” “drugs” and “sex” are banned, for instance. Others are incomprehensible (or troubling if you think about them for too long), like the aforementioned “Tony the Tiger” and “Eugene Levy.” Even tags with the numbers 69 and 420 are banned.

Many Tumblr users flock to the site to talk anonymously about their experiences, but some of these tag bans effectively censor those conversations. Several tags related to stimming, a common coping practice for autistic people, are banned, along with tags like “depression,” “PTSD” and “bipolar.”

“We understand that these adjustments will impact how users are able to access potentially sensitive content while using our iOS app, and that can be frustrating,” a Tumblr spokesperson told TechCrunch. “We are working on more thoughtful solutions which will be rolled out in the near future and we will keep the community updated as that work continues.”

A former Tumblr iOS engineer who blogs on the site as sreegs explained what might be causing this problem and its ineffective, bandaid-like solutions.

“If a reviewer [at Apple] runs your app and finds porn, your app is rejected and you’re told to correct the problem,” they wrote in a blog post. The engineer said that this would happen about “once every five updates,” but once the offending post — provided to Tumblr via screenshot — was removed, the app would be good to go.

“Once in a while Tumblr would get a really persistent reviewer. It would take a handful of porn scrubs and re-submissions before they’d finally green-light an update,” sreegs wrote. The engineer thinks that this is similar to what’s happening on Tumblr’s iOS app now.

Tumblr has faced a years-long struggle with approval on the iOS App Store. In 2018, Tumblr’s iOS app was taken down from the App Store after child sexual abuse material (CSAM) made its way through the app’s filtering technology. A month later, the platform reacted by banning all porn and other sexually explicit content, resulting in a near-immediate 29% monthly traffic decrease. Since then, the platform’s web traffic has remained relatively stagnant.

Of course, it’s a Sisyphean task to scrub a user-generated content platform of any adult content. But Apple’s standards for Tumblr seem particularly stringent.

“A little part of me also wants to be cynical and say that since Instagram and Twitter are so big, they can get away with more than Tumblr can,” the former Tumblr iOS engineer theorized. “Combine that with Tumblr’s history of blatantly allowing porn up until the end of 2018. I can’t prove it, of course, but if Tumblr has a reputation at Apple, it can’t be a good one.”

In the meantime, Tumblr content is being banned tag by tag, from #rule 34 to #long post.

Tumblr wrote on its Changes blog yesterday that it’s reviewing the list of tags that can’t be accessed in the iOS app, and it expects this review process to pick up in January.

“We’re working on a web-based toggle that would allow folks to opt into allowing sensitive content in the iOS app,” it added.

Tumblr users often refer to the platform as a wasteland of the internet. The app itself once subtitled its iOS app as “hellsite (affectionate)” in the App Store. So why do people keep using it?

“We’re busted enough that people assume the site is dead, so stuff like this has super easy workarounds,” a dedicated Tumblrite told TechCrunch. It’s not hard to find these workarounds if you search “tag ban,” on the site, but regular users know that the search function is very buggy anyway. “I bet the broken search feature is actually coming in clutch here. Shit just doesn’t show up half the time, which means we can’t find it, but neither can Apple.”

But what Tumblr lacks in working iOS apps and search functions, it makes up for with its algorithm… or lack thereof. As platforms like TikTok, Twitter, YouTube, Facebook and Instagram face the Senate to talk about the mysterious ways they serve content, Tumblr is making it work (define “work”) the old-fashioned way. It displays content from users you follow in reverse chronological order.

“I honestly believe being a dumpster fire has fully worked in Tumblr’s favor at this point,” the avid Tumblr user said. “We’ve got no algorithm, so we still get to curate our experience exactly how we want.”