Websites hosting third-party content to leverage their authority in Google (called “parasite SEO”) are in Mountain View's crosshairs. A new policy is disrupting established SEO strategies. Moz defined 5 risk levels to assess sites' vulnerability to this major change!
Key takeaways:
- Over the year, Google launched a series of targeted manual actions against sites abusing their reputation through third-party content, particularly in the coupons and gambling sectors.
- Large brands using subdomains to host affiliate content are the most at risk.
- The distinction between manual actions and algorithms remains blurred, suggesting a possible move toward automated detection.
In March 2024, Google announced the implementation of a new anti-spam policy specifically targeting " abuse of site reputation ", a practice of publishing third-party pages to exploit the ranking signals of a reputable host sitealso called “parasite SEO”. This announcement was followed by a series of punitive actions that hit several major web names hard.
A series of punitive actions for parasitic SEO
The first wave of sanctions fell in May 2024, targeting especially sites offering discount coupons and gambling-related content in the United States. Subdomains like coupons.usatoday.com or coupons.cnn.com saw their visibility collapse in search results.
The situation became more complex in October 2024 with a second round of penalties affecting other major brands. Google then clarified that these were not actions related to reputation abuse, but rather of systems detecting if a section of a site significantly differed from its main focusThis statement sowed confusion, suggesting an algorithmic component to the penalties.
Finally, a third wave of manual penalties occurred in November 2024, during the major core algorithm update, amplifying the effects of the October penalties.
A 5-level SEO risk scale
Faced with this complex situation, a risk scale inspired by the DEFCON system was developed by MOZ to assess the vulnerability of sites to Google's new policy.
French version of the table:
| Source of information | Content type | Business model | Example |
|---|---|---|---|
| Written by a third party | Simply hosted | Affiliation | Promo codes subdomain of a general-interest media site |
| Written by a third party | Licensed / rented | Affiliation | Directory of investment advice on a general-interest media site |
| Written by a third party | Personalized content | Affiliation | Lawnmower sales section, written by a third party, on a decor site |
| Written by you | Off-topic | Affiliation | Psychic readings section on your debt consolidation site |
| Written by you | Off-topic | Editorial | Garden blog dedicated to selling links on your general news site |
Level 1 – Dedicated subdomains
This level represents the highest threat and mainly concerns sites that host third-party content on subdomains or subfolders. These contents are generally heavily monetized and created with the explicit purpose of exploiting the main site's reputation to improve their SEO ranking.
The most blatant examples are major American media like USA Today, CNN, Business Insider or CNET, which saw their coupon sections (hosted on subdomains like coupons.usatoday.com) lose almost all of their visibility in search results.
Being a domain registrar itself, Google can easily detect these practices via CNAME records. Detection is made even easier because these contents are often massively distributed and show easily identifiable patterns.
Level 2 – Licensed third-party content
This category, although technically different from level 1, presents a risk is almost just as high. It includes sites that obtain licensed content from third parties but host and distribute it themselves on their infrastructure. Sections like forbes.com/advisor, marketwatch.com/guides, cnn.com/cnn-underscored or wsj.com/buyside are representative examples.
These contents, even when personalized with the host site's branding and logo, remain fundamentally duplicated content duplicated content distributed to multiple partnersSuperficial personalization is not enough to hide the standardized nature of the underlying content. The sites affected suffered major visibility losses during Google's recent updates.
Level 3 – Customized third-party content
This level marks the entry into a a gray area where risk assessment becomes more complexIt concerns sites that commission bespoke content from third parties. Although Google recognizes the legitimacy of ' columns, opinion pieces and other works of an editorial nature ', the search engine remains vigilant about content that is clearly created to exploit SEO opportunities unrelated to the site's natural audience.
An example cited by Google is a film review site that would publish optimized content to target ' best essay writing servicess'. Even if this content is unique and created specifically for the site, its purely SEO-driven intent and its mismatch with the main subject of the site make it suspicious in Google's eyes.
Level 4 – Off-topic content produced internally
The notion of “off-topic” content introduced by Google raises many questions. This level concerns sites that produce original in-house content, but clearly oriented toward monetization via affiliate marketing, on topics far removed from their core business. For example, a local sports news site publishing articles about the best cashback credit cards violates the spirit of the new rules, even if the content is original.
Google distinguishes between isolated affiliate links in editorial content (acceptable if properly disclosed) and aggressive affiliate models where the content is created solely to generate commissions. Note that video game sites publishing guides on gift cards with sponsored content currently seem less at risk, according to Google's current guidelines.
Level 5 – Editorial content occasionally off-topic
The lowest risk level concerns sites that produce occasionally editorial content that deviates from their main topic. Google has clearly stated that this type of content is not a problem as long as it is genuine original editorial work. However, the search engine warns against attempts to circumvent consisting of simply labeling third-party content as "Editorial Review."
According to Google, " no editorial involvement can change the fundamentally third-party nature of the content or the unfair and exploitative character of the attempt to benefit from the host site's ranking signals ". This clarification emphasizes the importance of the authenticity of editorial work rather than superficial labels.
Is affiliate marketing in Google's crosshairs?
Although Google says it does not specifically target affiliate content, the majority of penalized sites exploited this business model (formerly called Made For AdSense or "MFA"). The official recommendation to explicitly disclose affiliate links does not solve the underlying problem: using authoritative brands to push third-party content into search results for competitive keywords.
For sites operating at risk levels 1 and 2, the danger is imminentThose at level 3 should seriously rethink their strategy for the coming months, without necessarily deleting all their content. The likely integration of these criteria into the algorithm suggests that a cautious, thoughtful approach is now necessary regarding third-party content and affiliation.
The article “Parasite SEO: assess the risk to your site!” was published on the site Abondance.
