(See Edit) Count me in the "me too" category. Pretty sketchy process. I've revoked their permission to my Facebook account and pray my cc info is not being sold on the Russian black market. Edit: Trevor at TinkerCoin cleared up the issue and the BTC are in my Coinbase wallet. So Kudos to them.
Completely understand your frustration. We have to keep a very high bar because of the possibility of credit card fraud, and sometimes we have false negatives. Sorry for the confusion!
Have you implemented Mastercard Securecode/Verified by Visa? These offer you protection against chargebacks for "cardholder unauthorized" chargebacks, which account for roughly 60% of all chargebacks in card-not-present transactions.
