Reddit has spent a year suing scrapers. On 28 August one of them answered back: docket entry 119 in Reddit, Inc. v. SerpApi LLC in the Southern District of New York is recorded as "Answer to Amended Complaint AND Counterclaim," and the counterclaim is an antitrust one.

The theory

SerpApi pleads monopolisation and attempted monopolisation under Section 2 of the Sherman Act, plus four declaratory counts. The alleged market is narrow and precisely drawn: programmatic access to large-scale authentic human conversational data in topic-organised threaded forums, for search indexing and for the training and grounding of AI systems. The factual core is a sequence — a data partnership with one search company announced in early 2024, followed in mid-2024 by a robots.txt change that left programmatic access open to that one partner, while the technical measure Reddit relies on in its own case was not deployed until months later. Remedies sought include treble damages and an injunction against serving requester-specific robots.txt directives that discriminate by licensing status.

What the common framing gets wrong

Four corrections, all load-bearing. This is a pleading, not a ruling — no judge has assessed it, and a motion to dismiss from a different defendant was still pending when it landed. One defendant filed it: the docket shows a separate, plain answer from another party the same day, without a counterclaim, so "the defendants countersued" is wrong. No regulator is involved — this is a private counterclaim, not an antitrust investigation. And no dollar figure is pleaded; the request is for actual damages, trebled.

The weakest link

The market definition is where this will be attacked. A market consisting of threaded human conversation on topical forums is close to a market of one product, and single-product market definitions are the standard failure mode of Section 2 claims at the dismissal stage. The scraping precedents SerpApi cites are access cases, not antitrust cases, and do not hold that restricting robots.txt violates the Sherman Act.

Why it is worth watching anyway

Reddit's own suit is built on DMCA Section 1201 circumvention and unfair competition, not on ownership of user posts. The counterclaim inverts the frame: if exclusive platform data deals become an antitrust exposure, the structure of the AI training-data market changes regardless of who wins this case.