Honestly... I have no idea how the seller did it, but I got emails about the product not being delivered, and they weren't from Amazon.

If I had to guess, the seller was able to use a database somewhere to match my name/address with my email account. Those are easy enough to find.

Aaron Dinin, PhD

I teach entrepreneurship at Duke. Software Engineer. PhD in English. I write about the mistakes entrepreneurs make since I’ve made plenty. More @ aarondinin.com