Hello. I don't think a US server would matter that much. The ISP can track what you're getting wherever it comes from. For those who buy slysoft, the card fraud departments have been making some calls to verify the sales. Now talk about big brother taking a look.
Is it safe to buy Slysoft or any other ripper software? Ever consider those card purchases for bulk amounts of DVDR media? I suspect the ripper authors and vendors, and pirates will be sought out before the individuals who are only backing up their purchased DVDs.