It offers more info to vendors, so they can make better judgments about who to work with, while providing no more info to, for example, LE who might compromise the site. The old buyer stats showed a total number, but anyone who accessed your account could see your reviews going back 4 months, so they could still calculate your 1 month and 3 month purchasing stats. SS, I think that's how they were able to calculate the stats. Purchasing info goes back 4 months. You can see the info in your reviews, by clicking on the individual items. So they calculated the 1 month and 3 month stats, then subtracted the 3 month stats from the total to get the 1 year and all time stats. Numerous people have pointed out that the 1 year and all time stats (for accounts that have been around for 2 years, eg) are identical, and that is why. They don't have the old data.