UK's competition regulator tells Facebook and eBay to conduct an urgent review of their sites to prevent sales of fake and misleading online reviews
Context & Ripple Effects
This 2019 intervention is the opening move in what became the UK Competition and Markets Authority's longest-running campaign on review integrity. The regulator started with an informal nudge — telling Facebook and eBay to audit their own sites for the sale of fake and misleading reviews rather than launching a formal case.
The escalation since then is visible in the coverage trail: the CMA called for a pro-competition regulatory regime covering Facebook and Google in 2020, opened a formal investigation into whether Amazon and Google do enough against fake reviews in 2021, and by 2025 had extracted a [[a:881691|binding commitment from Google to curb fake-review-boosted star ratings, with three years of reporting to the CMA]]. What began as a request to two marketplaces has hardened into supervised obligations.
First-order effects
- Facebook and eBay must now conduct urgent internal reviews of their platforms to identify and remove listings or groups selling fake and misleading reviews — compliance work lands on their trust-and-safety teams immediately.
- Sellers and pages using those venues to trade fabricated reviews face removal of their offerings, tightening the supply side of the fake-review economy on both platforms.
Second-order effects
- The CMA's request-based approach set a template it applied to bigger targets: Amazon and Google were pulled into a formal investigation over the same conduct within two years, showing rivals cannot treat review manipulation as another platform's problem.
- Platforms that fail to act voluntarily risk being moved from informal pressure into enforceable commitments — the path Google ultimately took — raising the cost of inaction across the marketplace sector.
Third-order effects
- If the pattern holds, UK regulators are converting review integrity from a discretionary platform policy into a supervised obligation with reporting requirements, making trust metrics like star ratings a regulated surface rather than purely a commercial one.
- The sequence — informal request, regime proposal, investigation, negotiated commitment — points toward a structural shift where competition authorities police information quality on dominant platforms, not just pricing and market power.
The trend: The UK's CMA is ratcheting up from informal requests to binding, monitored commitments on fake reviews, turning review integrity into a regulated obligation for major platforms.