Play the "Find the Cat" game on the Facebook Groupon page. After you find the cat, you'll get a coupon good for $5 off $5 at Groupon. (I found the cat under "The Honest Company" lower left.) It expires 10/24, and goes directly into your account at Groupon.
Remember, Groupon now has a huge section of merchandise under "Groupon Goods" that don't require vouchers. The merchandise ships directly to you when you order.
This would be free with your $5 off $5 credit.
New to Groupon? Start here then come back and click here: Facebook Groupon page