Well, it does raise the issue brought up by SS of how you can differentiate one year stats from all time stats unless you keep a monthly log of these basic stats. I think as long as the transaction data is gone, people are fine with it. In other words, keeping old records around of specific transactions creates a liability in the event the transaction database is compromised, and at no real benefit because old transactions are not actionable (can't go into resolution, etc.), while simple aggregate monthly statistics, stripped of identifying info about the specific buyers, vendors, and products, will suffice to build buyer stats.