Google's updated site reputation abuse policy clarifies that publishing third-party content with the intent to exploit the host site's ranking signals is a violation, regardless of any first-party involvement or oversight. To comply, ensure that any third-party content on your site is genuinely integrated and not used to unfairly benefit from your site's established ranking authority. Avoid placing third-party pages solely to gain search ranking advantages, as this can trigger manual actions and harm your site's reputation. If you receive a manual action, simply noindexing the content is insufficient; you must submit a reconsideration request through Search Console explaining the corrective measures taken. [Google]