The "hidden cost" of click fraud is severe data pollution. Fraudulent clicks create high bounce rates and low Time-on-Page for the targeted landing pages.
When this junk traffic is mixed into your Google Analytics and Google Ads data, it falsely signals to the algorithms that your landing page provides a poor user experience. This can inadvertently hurt your Quality Score, which increases your Cost-Per-Click (CPC) and limits your ad visibility.
In the long term, if the invalid clicks come through your site's organic listings (a form of Negative SEO), it can even signal low quality to Google, potentially dampening your organic search rankings.
It is vital to actively segment out and filter this IVT data from your analytics to preserve the integrity of your performance metrics.