I paid a contractor w/ a credit card over the phone. I wanted a receipt, gave him an email. He uses Square, they linked that CC and email, now every purchase w/ that CC at a Square kiosk generates an email receipt. I have no account, how do I opt out/unlink? #privacy
Follow up: in the brief time that my email was in Square's system, they opted me into ads from a local merchant I used the card at a month before Square got my email. So I get to opt out of those now too... #privacy
By the way, I know all of this because I've been handing out custom per-use email addresses for years. Makes it easy to find when someone sells you out.