Google’s Gary Illyes explained in Google’s official blog how Google uses spam reports.
Google uses we spam reports only to improve the spam detection algorithms. Spam reports are not used for manual actions.
“Spam reports play a significant role: they help us understand where our automated spam detection systems may be missing coverage. Most of the time, it’s much more impactful for us to fix an underlying issue with our automated detection systems than it is to take manual action on a single URL or site.”
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