I just experience this. First I got a pre-paid Visa gift cards to make three purchases. They would not accept that for payment.
Then I got some Groupon gift cards. After almost a week of going insane and loosing out on a concert deal that I desperately wanted, I found out about this bull *** credit card that must be added.
If I wanted to add my credit card I would not have gone out and purchased Groupon Gift Cards.
What really outraged me is when Groupon told me there system is very safe and secured. I hate with a passion when any companies say this ***. All companies are at risk of being hacked into.
Product or Service Mentioned: Groupon Gift Card.
Reason of review: Problems with payment.