Reddit is now using AI to hunt the brands that are using AI to flood Reddit with promotional slop — all in an attempt to manipulate what ChatGPT and Google’s AI search tools recommend. The platform says its AI-powered spam detection is now blocking 23 million spam views each day, catching roughly 25,000 “spammy posts and comments,” and revoking nearly 2 million “inauthentic votes,” according to The Verge’s coverage of Reddit’s announcement.
🔍 THE BOTTOM LINE
The fight is AI against AI, and the stakes are whether the source material ChatGPT and Google AI use to answer your questions is human conversation or paid brand placement. Brands have figured out that because AI chatbots lean heavily on Reddit for answers, seeding Reddit with promotional content is a cheap way to rig what those bots recommend. Reddit’s response — automated detection at scale — is the only realistic defence, but it’s also the platform admitting that human moderation alone cannot keep up with AI-assisted manipulation.
What Reddit Is Doing
Reddit announced a suite of AI-powered spam-detection tools that operate at a scale no human moderation team could match. The headline numbers: 23 million spam views blocked per day, 25,000 spammy posts and comments removed per day, and roughly 2 million inauthentic votes revoked. The platform is also targeting “coordinated patterns of fake behavior and artificial hype,” which is the polite term for what happens when a marketing firm deploys a fleet of warmed-up accounts to make a product look organically popular, as The Next Web reported.
The tools are not public — Reddit has not disclosed the models or the detection heuristics — but the platform framed them as necessary because the manipulation tactics have grown sophisticated enough that catching them “increasingly relies on pattern recognition rather than any automated system,” in the words of a moderator quoted by Mashable.
Why Brands Are Flooding Reddit
The reason is generative AI-engine optimization — GEO, sometimes called AEO (AI-engine optimization) — and it is the direct descendant of the SEO industry that has shaped Google results for two decades. Because AI chatbots like ChatGPT and Google’s AI Overviews regularly surface Reddit threads in their answers, brands have worked out that seeding Reddit with strategically placed product mentions is a low-cost way to influence what those bots recommend. The platform is, in effect, a training-data goldmine for the answer engines that are displacing traditional search.
Mashable’s reporting identified one company, RedRover, that openly advertises deploying AI agents to mass-publish content across Reddit and blogs to influence both Google and ChatGPT rankings. The accounts doing this are deliberately built to look human: they have posting histories, organic-seeming engagement, and strategically timed brand mentions buried in high-traffic threads. The r/biohackers subreddit — a large community focused on supplements and DIY biology — recently restricted posts about peptides and hormone replacement therapy after moderators discovered that companies selling those products had been systematically seeding the community with sponsored content designed to be scraped by AI tools.
The Irony: Reddit Sells the Same Data
Here’s the twist that makes this story harder to file as a clean good-versus-evil narrative. Reddit has simultaneously struck licensing deals with AI companies — including OpenAI — to allow their models to train on Reddit content for commercial use. The platform is, at once, selling its data to AI and struggling to keep AI-driven manipulation out of its communities.
That dual role is not incoherent — it’s the business model. Reddit needs the licensing revenue, and it needs the community trust that makes the data worth licensing in the first place. If the data becomes obviously polluted with brand slop, the licensing deals lose their value. So Reddit is spending real engineering effort on keeping the well clean, even as it sells water from the same well.
This is the same dynamic we’ve seen with Google AI Overviews and the publisher death spiral — the platforms that aggregate human content for AI answers are now responsible for the integrity of that content in a way they never were for search results. Reddit’s response is to treat AI slop as a security problem, not a content policy problem.
How This Fits the Broader GEO Story
Generative engine optimization is the new SEO, and the rules of the game are still being written. Reddit’s enforcement push is one of the first large-scale platform responses to GEO-as-manipulation (as distinct from GEO-as-legitimate-content-strategy). The line between the two is not obvious: a brand that posts genuinely helpful product information to Reddit is doing nothing wrong; a marketing firm that deploys AI agents to mass-publish strategically timed brand mentions across hundreds of subreddits is clearly manipulating the platform.
Reddit’s detection tools are, in effect, trying to draw that line programmatically. The 23-million-views-blocked figure is the platform’s way of saying: we see the manipulation, we are acting on it, and we have the scale to do something about it. Whether the tools catch the sophisticated operators — the warmed-up accounts with organic posting histories and strategically timed mentions — is an open question that Reddit’s own moderators are skeptical about.
NZ Angle
New Zealand has no domestic equivalent of Reddit, but the GEO problem reaches NZ in two ways. First, NZ-based brands and marketing agencies are almost certainly using the same tactics on Reddit to reach global audiences — there is nothing in the GEO playbook that requires US jurisdiction. Second, the broader question of what AI chatbots recommend to NZ users is increasingly shaped by Reddit content, which means NZ consumers are downstream of this fight. If Reddit’s detection fails, the ChatGPT answers NZ users get when they ask about a product, a health supplement, or a travel destination are partially shaped by paid brand placement that no one has disclosed.
This connects to the broader NZ slop-over-substance problem we’ve covered: the integrity of AI-generated answers is a public-interest issue, not just a platform-policy issue. Reddit’s fight is a piece of that.
❓ FAQ
What is GEO and why does it matter? Generative engine optimization (GEO), sometimes called AI-engine optimization (AEO), is the practice of creating content specifically to be scraped and surfaced by AI chatbots like ChatGPT and Google AI Overviews. It matters because AI answers increasingly shape what people buy, believe, and trust — and GEO lets brands pay to influence those answers in ways that are invisible to the user.
How much AI spam is Reddit actually blocking? Reddit says 23 million spam views per day, 25,000 spammy posts and comments per day, and roughly 2 million inauthentic votes. The company has not disclosed the false-positive rate or how many of those removals are contested by legitimate users.
Why doesn’t Reddit just ban AI-generated content? Because it can’t reliably tell what is AI-generated. The sophisticated manipulation accounts are deliberately built to look human, with posting histories and organic-seeming engagement. A blanket ban on suspected AI content would catch large numbers of legitimate users. Reddit’s approach is to target behavior patterns — coordinated posting, inauthentic voting, strategic brand mentions — rather than the content itself.
Is Reddit’s licensing deal with OpenAI part of the problem? It’s part of the context. Reddit licenses its data to AI companies for training, which gives brands a financial incentive to pollute that data with promotional content. Reddit’s enforcement push is partly about protecting the value of the data it sells — if the data is obviously manipulated, the licensing deals lose their worth.
Does this affect what I see in ChatGPT or Google AI answers? Probably yes. If Reddit’s detection fails, the Reddit-sourced answers in ChatGPT and Google AI Overviews will be partially shaped by undisclosed paid brand placement. If Reddit’s detection succeeds, those answers will be somewhat cleaner. Either way, you should treat AI-chatbot product recommendations with the same skepticism you would treat a sponsored Instagram post.
🔍 THE BOTTOM LINE
Reddit’s AI-versus-AI spam fight is the first large-scale test of whether platforms can defend the integrity of the human conversation that AI chatbots now use as their raw material. The numbers are big — 23 million spam views blocked daily — but the sophisticated operators are still getting through, and the platform’s own moderators are skeptical that automated detection can keep up. For anyone who uses ChatGPT or Google AI for recommendations, the takeaway is that the answer you get may be partially paid-for, and there is no label telling you which part.
