Reddit’s automated systems caught around 25,000 spammy posts and comments a day in the first quarter of 2026, and a growing share of that material was never written for Reddit’s users at all.

The Verge reported on 4 August that brands, along with a young industry of agencies selling AI visibility, are planting product recommendations inside subreddits so that ChatGPT, Gemini and Google’s AI answers repeat them as ordinary community advice. The reporting followed Reddit’s own disclosure, published on 6 July, that it had turned large language models on the problem.

The pressure behind the tactic is familiar to any marketing manager who has been asked why the brand does not appear in ChatGPT. Reddit sits among the most-cited domains in AI-generated answers, and the market for getting into those answers is now funded at scale: Profound, which tracks and works to shape how brands appear inside AI assistants, raised $96m at a $1bn valuation in February. What has changed since is that the cheapest route into an AI answer is also the one now being removed, and the brand name is what stays attached to it.

How much of this is Reddit actually catching?

Reddit said in a blog post on 6 July 2026 that its upgraded automated systems detected about 25,000 spammy posts and comments a day during the first quarter, cutting users’ exposure to spam by roughly 20% year on year. The company said it was also blocking around 23 million spam views a day and revoking close to 2 million inauthentic votes. It attributed the higher detection count to better tooling rather than a surge in spam.

The change Reddit described is in what the systems look for. Instead of scanning for crude promotional writing, they are tuned to spot coordinated fake behaviour and manufactured hype across accounts, with signals assessed from the point an account is created. Reddit said it uses its own language models to find the patterns older filters missed.

Every one of those figures is Reddit’s own, and the systems behind them have not been independently audited. The one measure pointing outside the platform’s automation is a volunteer one: Reddit said community moderators were responsible for more than 52% of post and comment removals between July and December 2025.

Why is a Reddit thread worth planting a post in?

Reddit is the most-cited domain on Perplexity and sits among the top three on ChatGPT Search and Google AI Mode, according to Semrush, which analysed 248,000 Reddit URLs cited across 217,000 prompts and refreshed the dataset in October 2025. Reddit took a 4% citation share on Perplexity, 13% on ChatGPT Search and 9% on Google AI Mode.

The same study explains why seeding is cheap. Of the Reddit posts cited by those tools, 80% had fewer than 20 upvotes and 70% had fewer than 20 comments, with median upvotes running between five and eight. The cited posts were old, averaging around 900 days, and short, at a median of about 80 words. Question-and-answer threads accounted for more than half of all citations, and comparison posts came next. A brief, unremarkable answer in an ageing “best tool for X” thread is close to the ideal shape for citation, and it is also close to what a planted comment looks like.

The route exists because Reddit sold it. OpenAI and Alphabet both pay Reddit for content access, which is part of why the site appears in answer sets at all. Researchers at Cornell Tech set out the ceiling on the attack in a May 2026 preprint, “Deep-Research Agents Can Be Poisoned via User-Generated Content”, which found that planted text as short as 13 words could steer AI research agents towards recommending fabricated products in controlled tests. That is a laboratory result rather than a measure of live conditions, and no published figure exists for how many real AI citations are compromised.

Where does the risk land when a planted post is removed?

Honeydew Labs, a skincare company, supplies the clearest answer so far. After members of r/SkincareAddiction flagged accounts recommending its hypochlorous acid spray in threads about rival products, a moderator set the subreddit to filter posts mentioning the company automatically, The Verge reported. The agency’s name does not appear in that filter. The brand’s does.

The removals have not stopped the practice. Shanzila Ahmed, who runs the agency ReachLLM, told Bloomberg her team had landed client posts inside ChatGPT citations within a day of publishing them, and that Reddit had since taken some of the same posts down. Her stated response is to keep publishing at regular intervals, which describes a recurring cost rather than an acquired asset.

The pattern is not confined to skincare. Moderators of r/Biohackers restricted posts about peptides and hormone replacement therapy in June, after 404 Media reported that companies selling those products had been seeding the community with material built to be scraped by AI search tools. Reddit’s rules already prohibit repeated or unsolicited mass engagement, so a seeded campaign breaches platform policy regardless of how it is disclosed anywhere else.

The assumption underneath the tactic is contested too. Google’s Jennifer Kutz told The Verge that Reddit gets no special preference in the company’s ranking systems, that its AI features do not set out to surface any particular platform, and that Google’s systems are built to judge whether user-generated content is helpful or low quality.

For B2B teams, the named cases are consumer ones, but the format is not. The threads that draw citations are the comparison and question-and-answer discussions, including the ones about software, and those subreddits carry the same moderation and the same brand-level exposure.

Reddit has not published a false-positive rate for the new detection systems, and has not said whether brands whose products appear in removed posts face any consequence beyond the removal itself.