Tyler 'Ninja' Blevins, one of the world's most popular streamers who recently left Twitch to stream on rival platform Mixer, took to Twitter to apologize to his fans after his dormant Twitch channel was found to be promoting other Fortnite streams, including one that was broadcasting pornography.

Since Ninja left Twitch a few weeks ago, his old channel has been used to promote a variety of Fortnite streams. Yesterday, those who went to the page discovered that one stream being promoted was streaming pornography, which is a gross violation of Twitch's terms of service.

In a video posted to his Twitter account, Ninja criticized Twitch for how they were using his channel since his departure. Expressing disgust at the content being promoted, Ninja said that while his split with Twitch has been "professional" up to this point, he feels that this incident crossed a line.

Ninja called on Twitch to remove the advertisements and his entire channel. Twitch has since partially fulfilled his request, as Ninja's channel now only links to videos of his older streams and does not advertise other channels. Twitch CEO Emmitt Smith also apologized to Ninja in a series of tweets, explaining that what happened was not intentional, but that it doesn't excuse the mistakes that were made.

As to why Ninja's channel was advertising other streams, Smith explained that Twitch has been testing out a feature where offline channels advertise other recommended content across the platform.

" Our community comes to Twitch looking for live content," Smith wrote. "To help ensure they find great, live channels we’ve been experimenting with showing recommended content across Twitch, including on streamer’s pages that are offline."

At the time of his departure, Ninja's Twitch channel had 14.7 million followers.