Lots and lots of people are using Mint.com to manage their personal finances. Heck, why not. It is an amazing online service and it is free. What you may not know is they are gathering your spending habits at which stores all over the planet. Then they can use that data and provide from very interesting spending trends below. They are not exposing your name publically, don’t know if they are selling it, but they are aggregating the data up into interesting trend charts at mintdata.com. Check it out, it is very cool!