Y’all, do not ever use Groupon+. They monitor every transaction you make with the card you used to sign up, even if it’s not a transaction using a Groupon.
I know because I’m sitting at a restaurant and just got an email from Groupon saying I’d missed out on a deal. They figured out I was at that restaurant by tracking my credit card. I disabled it as soon as I got the email but they must have tracked me for months.
@Kasil I'm in NYC, so it's legal as far as I know. The fine print seems to let them do it.