Seems targeted. Got an email from groupon saying this:
It Pays to Save!
Buy any deal onsite by Monday 3rd of December and get $10 back in credit next week to spend on your next Groupon!
It's simple! Select a deal of your choice worth $1 or more and enter the promo code shown below at checkout before completing the purchase.
Promo code: SAVE
We will credit your account with $10 to spend on your next deal next week.
does it limit 1 per person / account?