[Untit1ed]

I'm not sure whether it was due to changes in the algorithm, but at some point the logged-out front page that most people see became easily 50% outrage porn - a picture of a truck parking in two parking spaces, shaky video of someone being racist in public, most recently message conversations from horrible bosses.

When someone eventually makes an account and delves into the more niche subreddits, that's the culture that they're expecting and as more do it, it starts to change the culture of the niche subreddits as well.

Ironically the secret to reddit's success was that it was just left alone with very few changes for so long. The front page was already a dumpster fire at that stage, but a dumpster fire mostly contained to the top 20 subreddits. Now that it's more clever about pulling in posts from more niche subreddits that are doing well, or based on geolocation, it pulls people into the subreddits more which accelerates the Eternal September effect.