Today I received this mail from SS

Dear Contributor,

-"When our systems detect fraudulent transactions or other illegal activity, we rescind rights to fraudulently obtained assets and reverse related transactions.
Our records show that $... of your unpaid earnings were related to such activity. We have adjusted your account to reflect the reversal of these transactions and download count. For specific details, visit the Adjustments tab in your Earnings profile.

We take security seriously. If you have any questions about these updates, please contact us."-

Has anyone had experience with this so far? This is the first time I hear that there are such activities on SS