Step back and ask yourself what the purpose of the alias is. Do you want to unlink your market username from your forum username? If so, you shouldn't be using the same username in the first place, because you leak it to every vendor that you make a purchase from. Thus you link your market and forum accounts to every vendor. That's a threat to your privacy, because a vendor could intentionally or unintentionally reveal the association. Do you want to leave a review without the vendor knowing which buyer you are? Right now the stats are too specific and it should be trivial to do. I am a vendor. Someone with 3 m 5 d made a purchase off me 5 days ago, and today someone with 3 m 10 d left a review. Derp, they're the same person. Not too many vendors will get purchases on the same day from two accounts that are the same age down to the day, but if there's any doubt, the other stats will distinguish them. (And obviously vendors can save stats to identify their reviewers.) Under this implementation, an alias is a superficial and flawed privacy defense, and it doesn't matter if it's a hex string. The main reason I've heard why we should see buyer stats is to ferret out shills, but shills operate at the low end of the buyer spectrum. Dividing the stats into two categories could be sufficient: less than 10 purchases vs more than 10 purchases, less than $1000 spent vs more than $1000 spent. You can ignore reviews from the low category. Maybe there could be a feature to hide them. If you want, you can subdivide into more categories, but I honestly don't see the point. I don't see why someone with $12,000 spent is inherently more trustworthy than someone with $2000 spent. And the account age is utterly useless. People can register accounts months before they use them for anything. I have accounts that are over 6 months old and one that is over a year old with no or little spent on them. If you think account age means anything, I can create a vendor account and easily fool you. Bottom line is, these stats are needlessly specific and threaten the privacy of buyers.