Thumb Score: -5
Groupon is having their "Exclusive Offer: $ 5 for a $ 10 Starbucks eGift Card!" on their Facebook page. Tho it states "This deal is by invite only".
DO NOT LOG IN YOUR GROUPON ACCOUNT, USE LOG IN WITH FACEBOOK. Then you should be get to the payment page.
Or at least that is how I get this, I did not get invitation email.