Its because merge is off shore...prepaid visa and visa gift cards quit excepting international purchases.Same with greendot will not work.Use a prepaid PayPower travelers card.You can purchase them @ a lot of locations.They are travelers card so they will work internationally with no hold ups.I have used this method several times on a few sites including merge with no problems.Also if you want to play on a Merge skin that has 24 hour live chat try SportsBook PlayAces...they have 24/7 live support and payments are a little quicker than carbon.as for the paypower cards just google it for a location near you.