That literally means nothing at all on their server backup from the year before. You could delete and rewrite your comments a thousand times and it would do you the same amount as good as one time, and barely any better than doing it no times at all. Your entire 15 year comment history would take up probably 10MB of space at best. They’ll have several back ups taken over the last decade. They aren’t just going to be selling off the live servers info.
That literally means nothing at all on their server backup from the year before. You could delete and rewrite your comments a thousand times and it would do you the same amount as good as one time, and barely any better than doing it no times at all. Your entire 15 year comment history would take up probably 10MB of space at best. They’ll have several back ups taken over the last decade. They aren’t just going to be selling off the live servers info.