I have no idea how they got my credit card number. I can tell you that my wife and I always, 100% of the time refuse any offers of this type and there is no way that can ever be confusing. This is definitely a scam. I contacted the CC company and the dispute dept connected directly to DRI. They did refund the initial membership but I have to file a claim for the monthly charges. That will probably take several months.

Unauthorized charges appeared on my visa. $1.87 on 10-19-07 and $39.95 on 11-6-07.