I recently got an interesting email from Numbers Guy reader Michael Gazzolo: "I made a purchase on Amazon.com and checked the tracking info and it claimed to be delivered two years ago to New Jersey ...

If you’ve ever ordered anything from the internet, you’ve probably had that tracking page loaded up in a tab and hit refresh to track its progress. Unfortunately, for the most part, we’ve been ...

Have you heard about the secret Amazon return blacklist? They're quietly banning people who return "too much" — but just how ...

That just left the question: why is Amazon tracking such granular data in the first place? It turns out that Amazon has a few answers to that, some more convincing than others. The main feature Amazon ...