[Johnny555]

What data does the USPS sell other than change of address (which I'm a fan of since it means I rarely have to update my address when I move, the businesses I care about find out from the USPS). I know they scan incoming mail, do they sell any of that information?

[dereg]

I don't know if this constitutes "selling data", but the USPS allows you to run direct mail campaigns on routes and neighborhoods. The USPS provides moderately granular, aggregate data about the route/area, which you can then target. Some of the data includes household income, household size, and age brackets. Insofar that I know, you cannot unsubscribe from this type of mail.

You can see for yourself here: https://eddm.usps.com/eddm/select-routes.htm

[pc86]

I don't know if they're personalized or not but there are ads within the Informed Delivery emails, and it wouldn't surprise me to learn there is at least superficial tracking and/or personalization based on who you're [not] receiving mail from.